Replacement Lego Gears / Cogs, Pulley Wheels Worm Gears, String

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Z. Gears / Cogs, Pulley Wheels, Axles / shafts / rods, Wheels, string, tyres and hubs. AB. A. BD.
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Competion Prize Details - Perpetual Motion Machine

Replacement Lego wheels, hubs and tyres.
Click image for first page of wheels, hubs and tyres.

lego shafts, axles, rods, connectors.
Click image to search our Lego shafts / axle page

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Cog - item no. Z1
Lego cog light old grey
(tray BG)
Price: £0.28 each
Quantity available: 9

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Cog - item no. Z2c
Med stone grey
(tray X)
Price: £0.55 each
Quantity available: 0

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Cog plate - item no. Z4b
Medium Stone grey (modern)
Lego part number 3743 colour medium stone grey
(tray X)
Price: £0.65 each
Quantity available: 0

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Cog plate - item no. Z4c
4 x 1 black
Lego part number 3743 colour black
(tray G)
Price: £0.50 each
Quantity available: 3

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Cog - item no. Z2d
Light old grey Lego mindstorms cog / gear
(tray X)
Price: £0.55 each
Quantity available: 1

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Blue Cog - item no. Z2a
(tray X)
Price: £0.50 each
Quantity available: 0

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Yellow Cog - item no. Z2b
(tray X)
Price: £0.62 each
Quantity available: 0

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Cog - item no. Z10
Light old grey
(tray AFX)
Price: £0.25 each
Quantity available: 44

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Cog - item no. Z10b
Medium stone grey Lego cog (new)
(tray FB)
Price: £0.29 each
Quantity available: 34

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Cog - item no. Z10C
Medium stone grey Lego cog (modern type)
(tray H)
Price: £0.38 each
Quantity available: 5

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Lego pulley wheel - item no. Z3
Light old grey
(tray BE)
Price: £0.33 each
Quantity available: 10

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Lego pulley wheel - item no. Z3b
Medium stone grey
(tray F)
Price: £0.39 each
Quantity available: 4

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Pulley wheel - item no. Z5
Yellow pulley wheel - from Lego space shuttle set
(tray B)
Price: £0.40 each
Quantity available: 4

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Item no. Z5a
Regular brown Lego fly wheel
(tray C)
Price: £0.42 each
Quantity available: 2

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Item no. Z5c
Modern (reddy) brown Lego fly wheel
(tray X)
Price: £0.70 each
Quantity available: 1

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Item no. Z5b
Black Lego fly wheel
(tray AA)
Price: £0.40 each
Quantity available: 8

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Small red cog - item no. Z7
(tray X)
Price: £0.38 each
Quantity available: 0

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Small dark stone grey cog - item no. Z7a
Lego mini cog
(tray AB)
Price: £0.31 each
Quantity available: 6

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Small dark old grey cog - item no. Z7B
Lego mini cog
(tray X)
Price: £0.50 each
Quantity available: 0

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Large pulley wheel - item no. Z9
Lego technic large pulley wheel/steering wheel
Lego part number 3736 colour light old grey
Light old grey
(tray F)
Price: £0.90 each
Quantity available: 2

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Large pulley wheel - item no. Z9b
Lego technic large pulley wheel/steering wheel
Lego part number 3673 colour medium stone grey
Colour Medium stone
(tray B)
Price: £1.50 each
Quantity available: 1

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Lt Old Grey worm gear - item no. Z22a
Vintage item
(tray X)
Price: £0.60 each
Quantity available: 0

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Large white Lego pulley wheel - item no. Z9a
White Lego stearing wheel
(tray D)
Price: £1.20 each
Quantity available: 2

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Small yellow cog - item no. Z11
(tray X)
Price: £0.38 each
Quantity available: 1

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Black Lego technic worm gear - item no. Z13
(tray AA)
Price: £0.43 each
Quantity available: 4

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Large cog - item no. Z15
40 tooth Lego technic cog light old grey
(tray X)
Price: £1.40 each
Quantity available: 1

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Large cog - item no. Z15a
40 tooth Lego technic cog medium stone grey (modern)
(tray X)
Price: £1.40 each
Quantity available: 0

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Small grey cog - item no. Z17
Lt old grey Lego mini cog / gear
(tray CC)
Price: £0.23 each
Quantity available: 8

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Mini cog/gear - item no. Z17b
Medium stone grey
(Tray G)
Price: £0.25 each
Quantity available: 5

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Lego Technic differential casing - item no. Z19
(tray G)
Price: £2.15 each
Quantity available: 3

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Differential casing - item no. Z19a
Dark stone grey Lego differencial casing
(tray X)
Price: £2.30 each
Quantity available: 0

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Small yellow cog - item no. Z21
(tray X)
Price: £0.30 each
Quantity available: 0

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Grey cog - item no. Z23
Light old grey
(tray AAI)
Price: £0.28 each
Quantity available: 40

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Grey cog - item no. Z23a
Medium Stone Grey
(tray AAG)
Price: £0.28 each
Quantity available: 32

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Vintage red cog - item no. Z27
(tray AA)
Price: £0.42 each
Quantity available: 8

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Vintage yellow cog - item no. Z29
(tray A)
Price: £1.35 each
Quantity available: 1

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Gear pulley- item no. Z32
Fits micro motor
(tray AD)
Price: £0.40 each
Quantity available: 4

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Differential casing - item no. Z34
Dark old grey
(tray B)
Price: £2.00 each
Quantity available: 2

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Grey cog - item no. Z36
Medium Stone
(tray BB)
Price: £0.36 each
Quantity available: 10

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Grey cog - item no. Z36h
Light old grey version
(tray CA)
Price: £0.34 each
Quantity available: 11

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Item no. Z47b
(tray X)
Price: £0.65 each
Quantity available: 0

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Cog plate 12 long - item no. Z40
Price: £1.35 each
Quantity available: 0

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10 long cog plate - item no. Z42
(tray X)
Price: £1.20 each
Quantity available: 1

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Item no. Z44
(tray X)
Light old grey
Price: £1.30 each
Quantity available: 0

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Item no. Z44a
(tray B)
Price: £1.10 each
Quantity available: 1

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Misc item - item no. Z45
Dark old grey
(tray X)
Price: £0.53 each
Quantity available: 1

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Grey ball with grooves (wheel bearing) - item no. Z49
Light old grey colour Lego wheel gear (ball cog)
(tray H)
Price: £0.50 each
Quantity available: 5

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Grey ball with grooves (wheel bearing) - item no. Z49A
Medium stone grey colour Lego wheel gear (ball cog)
(tray F)
Price: £0.50 each
Quantity available: 4

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Item no. Z50a
(Tray X)
Price: £1.40 each
Quantity available: 0

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Technic disc - item no. Z55a
May not have decal
(tray BB)
Price: £0.21 each
Quantity available: 18

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Tan coloured cog - item no. Z58
(tray X)
Price: £0.60 each
Quantity available: 0

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Lego turntable - item no. Z59e
Black and md stone grey
(tray I)
Price: £1.60 each
Quantity available: 2

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Lego turntable - item no. Z59a
Black and dk stone base
(tray A)
Price: £3.00 each
Quantity available: 1

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Worm gear - Item no. Z64
Yellow
(Tray X)
Price: £0.62 each
Quantity available: 1

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Item no. Z65
Black
(tray D)
Price: £0.45 each
Quantity available: 2

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Item no. Z68
2 meter long Lego string - approx. 0.8mm
may not be boxed - suitable for technic cranes, pulleys.
Soft, knottable, strong, colour black
Price: £0.80 each
Quantity available: 8

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Item no. Z76a
16 long red cog plate
(tray X)
Price: £1.65 each
Quantity available: 0

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Item no. Z75
White 16 long Lego cog plate
Price: £1.30 each
Quantity available: 0

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Cog - item no. Z72
White large cog
(tray F)
Price: £0.46 each
Quantity available: 3

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Cog - item no. Z79
Medium Stone Lego cog / gear
(tray X)
Price: £0.65 each
Quantity available: 1

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Cog - item no. Z81
Black gear frame
(tray H)
Price: £0.47 each
Quantity available: 2

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Item no. Z83
Gear box
(tray g0)
Price: £1.65 each
Quantity available: 0

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Item no. Z84
Gear box
(tray g0)
Price: £1.95 each
Quantity available: 0

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Item no. Z87a
Medium stone and black turntable
(tray B)
Price: £2.65 each
Quantity available: 2

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Cog - item no. Z85
24 tooth white Lego cog / gear wheel
(tray X)
Price: £0.70 each
Quantity available: 0

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Item no. Z88
Regular brown gear selector
(tray E)
Price: £0.55 each
Quantity available: 3

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Item no. Z89
Yellow/green translucent Lego pulley wheel
(tray X)
Price: £0.55 each
Quantity available: 1

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Item no. Z91
Black lego gear
(tray X)
Price: £0.45 each
Quantity available: 0

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Item no. Z93
Dark stone grey Lego pulley wheel
(tray B)
Price: £0.50 each
Quantity available: 2

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Item no. Z97
Black cog plate with ball joints
(tray X)
Price: £0.90 each
Quantity available: 0

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Item no. Z94c
White disc with decal
(tray A)
Price: £0.40 each
Quantity available: 2

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Item no. Z94d
Black disc with decal
(tray A)
Price: £0.40 each
Quantity available: 2

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Item no. Z94f
Black disc with decal
(tray A)
Price: £0.40 each
Quantity available: 1

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Item no. Z99
White worm gear
(tray X)
Price: £0.90 each
Quantity available: 0

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Item no. Z101
Red worm gear
(tray X)
Price: £0.90 each
Quantity available: 0

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Item no. Z103
Medium stone grey Lego gear
(tray E)
Price: £0.48 each
Quantity available: 2

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Item no. Z102a
Dark old grey gear
(tray B)
Price: £0.55 each
Quantity available: 1

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Item no. Z102g
Medium stone grey gear
(tray A)
Price: £0.50 each
Quantity available: 1

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Item no. Z105
Blue gear casing part
(tray B)
Price: £0.75 each
Quantity available: 1

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Item no. Z106a
White gear casing part
(tray X)
Price: £0.75 each
Quantity available: 2

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Item no. Z107
Large green Lego gear
(tray X)
Price: £1.75 each
Quantity available: 0

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Item no. Z107a
Large black Lego gear
(tray X)
Price: £1.65 each
Quantity available: 0

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Item no. Z109
Clear translucent Lego gear casing
(tray C)
Price: £1.40 each
Quantity available: 2

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Item no. Z111
Yellow Lego gear casing
(tray X)
Price: £1.95 each
Quantity available: 0

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Cog - item no. Z113
Red Lego micro gear
(tray X)
Price: £0.65 each
Quantity available: 1

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Cog - item no. Z120
Lego gear
Medium stone grey 
(tray X)
Price: £1.50 each
Quantity available: 1

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Clutch - item no. Z121
Lego clutch brick
(tray X)
Price: £1.50 each
Quantity available: 1

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string - item no. Z169
Lego black string with connectors approx. 14cm long
(tray X)
Price: £0.70 each
Quantity available: 1

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string - item no. Z170
Lego black string with connectors approx. 20cm long
(tray X)
Price: £1.00 each
Quantity available: 1

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string - item no. Z171
Lego black string with connectors approx. 90cm long
(tray B)
Price: £0.60 each
Quantity available: 1

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string - item no. Z174
Lego black string with connectors approx. 30cm long
(tray X)
Price: £1.20 each
Quantity available: 1

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string - item no. Z175
Lego green string with connectors approx. 30cm long
(tray X)
Price: £1.20 each
Quantity available: 1

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string - item no. Z176
Lego black string with connectors approx. 7.5cm long
(tray G)
Price: £0.50 each
Quantity available: 3

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Click above image for 4 spoke gears (listed on Ship accessories page

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Looking for wheels or steering wheels? - See page A (Wheels and tyres) and page AP for vehicle parts - click the image above to search for technic steering wheels on Page A.

£1 postage supplement

Add a £1 postage supplement to your cart for priority dispatch

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Cog - item no. Z1a
Light old grey
(tray D)
Price: £0.28 each
Quantity available: 3

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Cog - item no. Z1b
Medium stone grey Lego gear
(tray X)
Price: £0.33 each
Quantity available: 0

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Cog - item no. Z2
Lt old grey 24 tooth Lego cog
(tray E)
Price: £0.45 each
Quantity available: 4

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Cog plate - item no. Z4
Light old grey Lego cog plate
Lego part number 3743 colour light old grey
(tray CB)
Price: £0.38 each
Quantity available: 10

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Black Lego cog plate/steering rack - item no. Z4a
13 peg long
(tray X)
Price: £1.35 each
Quantity available: 0

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Cog - item no. Z2e
Dark old grey Lego mindstorms cog/ gear
(tray X)
Price: £1.00 each
Quantity available: 0

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Black Lego cog plate/steering rack - item no. Z4k
7 peg long o/a
from set 8070
(tray X)
Price: £1.25 each
Quantity available: 0

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Cog plate - item no. Z4d
White Lego cog plate
(tray F)
Price: £0.60 each
Quantity available: 4

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Small blue cog - item no. Z6
(tray X)
Price: £0.42 each
Quantity available: 0

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Small black cog - item no. Z8
(tray X)
Price: £0.32 each
Quantity available: 0

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Red Cog - item no. Z10a
(tray X)
Price: £0.38 each
Quantity available: 0

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Small black cog - item no. Z12
(tray X)
Price: £0.42 each
Quantity available: 0

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Small pulley wheel - item no. Z14
Light old grey pulley wheel
(tray B)
Price: £0.38 each
Quantity available: 2

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Small pulley wheel - item no. Z14a
Medium stone grey pulley wheel
(tray C)
Price: £0.38 each
Quantity available: 2

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Small black cog - item no. Z16
Lego black cog
(tray CA)
Price: £0.24 each
Quantity available: 13

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Cog - item no. Z17a
White Lego mini cog
(tray X)
Price: £0.30 each
Quantity available: 0

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Large pulley wheel - item no. Z9c
Lego technic large pulley wheel/steering wheel
Light old grey
(tray X)
Price: £1.70 each
Quantity available: 0

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Small diff cog - item no. Z18
Lego differential gear cog (set 8860)
Light old grey colour (tray GB)
Price: £0.28 each
Quantity available: 21

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Beam cog plate - item no. Z20
(tray BD)
Price: £0.41 each
Quantity available: 12

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Medium Stone Grey worm gear - item no. Z22
(tray I)
Price: £0.45 each
Quantity available: 4

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Black Lego cog - item no. Z24
(tray X)
Price: £0.55 each
Quantity available: 0

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Grey cog - item no. Z26
Light old grey
(tray HF)
Price: £0.22 each
Quantity available: 29

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Grey cog - item no. Z26a
Medium stone grey gear
tray H)
Price: £0.30 each
Quantity available: 4

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Vintage blue cog - item no. Z28
(tray C)
Price: £0.55 each
Quantity available: 3

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Grey cog - item no. Z31
Light old grey
(tray B)
Price: £0.52 each
Quantity available: 1

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Cog - item no. Z31a
tan Lego bevel gear
(tray AX)
Price: £0.29 each
Quantity available: 6

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Black 16 tooth - item no. Z33
(tray X)
Price: £0.52 each
Quantity available: 0

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Cog plate - item no. Z35
8 peg O/A long grey
(tray A)
Price: £1.00 each
Quantity available: 1

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Buff cog - item no. Z36a
(tray E)
Price: £0.42 each
Quantity available: 2

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Cog - item no. Z36b
Black cog
(tray G)
Price: £0.43 each
Quantity available: 6

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Misc item - item no. Z38
3 long cog plate, light old grey with tow ball connectors
Price: £0.90 each
Quantity available: 0

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Dark stone grey Lego cog - item no. Z41
(tray AI)
Price: £0.37 each
Quantity available: 6

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Dark old grey Lego cog - item no. Z41g
From set 8880
(tray I)
Price: £0.45 each
Quantity available: 4

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Differential casing - item no. Z34a
Dark stone grey
(tray A)
Price: £1.95 each
Quantity available: 2

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8 long cog o/a plate - item no. Z43
(tray D)
Price: £0.62 each
Quantity available: 3

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Item no. Z47
(tray X)
Price: £0.60 each
Quantity available: 0

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Item no. Z47a
(tray X)
Price: £0.52 each
Quantity available: 0

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Dark old grey gear sleeve - item no. Z46
(tray X)
Price: £1.45 each
Quantity available: 1

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Orange gear sleeve - item no. Z46b
Price: £0.65 each
Quantity available: 0

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Grey gear sleeve - item no. Z46a
Medium stone grey Lego
(tray AC)
Price: £0.50 each
Quantity available: 5

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10 long cog plate - item no. Z48
Price: £0.90 each
Quantity available: 0

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14 long cog plate - item no. Z50
Price: £1.38 each
Quantity available: 0

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Small tan colour cog - item no. Z51
(tray X)
Price: £0.36 each
Quantity available: 0

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Technic clutch - Item no. Z53
White Lego technic clutch
(tray X)
Price: £1.75 each
Quantity available: 0

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Technic disc - item no. Z55
(tray C)
Price: £0.32 each
Quantity available: 2

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Technic disc - item no. Z55b
Obscure trans
(tray B)
Price: £0.42 each
Quantity available: 2

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Gear box - item no. Z57
Price: £1.25 each
Quantity available: 0

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Pulley wheel - item no. Z59
Red technic pulley wheel
(tray A)
Price: £0.40 each
Quantity available: 1

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Pulley string - item no. Z61
(string only), 600mm long (1.5mm dia. black)
Soft strong knottable string for firemans hose etc.
Price: £0.75 each string only
Quantity available: 4

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Pulley string/cord - item no. Z62
(cord only), 1200mm long (0.8mm dia. black)
High quality soft, strong knottable string for Lego pulleys, tows, cranes, rigging etc.
Price: £0.50 each
Quantity available: 10

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Buff/tan Lego differential cog - item no. Z66
(tray AB)
Price: £0.31 each
Quantity available: 4

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White Lego differential cog - item no. Z66a
(tray X)
Price: £0.50 each
Quantity available: 0

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Item no. Z64a
Blue worm gear
(Tray X)
Price: £0.70 each
Quantity available: 0

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Dark stone grey Lego cog - item no. Z67
(tray AB)
Price: £0.41 each
Quantity available: 6

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Cog - item no. Z73
Buff pulley wheel
(tray X)
Price: £0.45 each
Quantity available: 2

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Cog - item no. Z74
Silver grey
(tray D)
Price: £0.26 each
Quantity available: 2

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Item no. Z76
(tray X)
16 long yellow cog plate
Price: £1.50 each
Quantity available: 1

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Cog - item no. Z71
Orange
Price: £0.38 each
Quantity available: 0

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Cog - item no. Z78
Orange pulley wheel
(tray A)
Price: £0.55 each
Quantity available: 2

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Cog - item no. Z80
Lime green pulley wheel
(tray I)
Price: £0.35 each
Quantity available: 8

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Cog - item no. Z80a
Dark stone grey Lego pulley wheel
(tray B)
Price: £0.45 each
Quantity available: 1

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Cog - item no. Z80b
Blue Lego pulley wheel
(tray X)
Price: £0.45 each
Quantity available: 1

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Cog - item no. Z82
Large black Lego mindstroms cog / gear wheel
(tray X)
Price: £2.25 each
Quantity available: 1

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Cog - item no. Z82A
Large Medium Stone Lego mindstroms cog / gear wheel
(tray A)
Price: £2.05 each
Quantity available: 1

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Cog - item no. Z82B
Large Light Old Grey Lego mindstroms cog / gear wheel
(tray X)
Price: £1.95 each
Quantity available: 0

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Cog - item no. Z86
Large black and clear trans Lego turntable
(tray D)
Price: £2.15 each
Quantity available: 2

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Item no. Z87
Light old grey Lego vintage turntable
(tray D)
Price: £2.35 each
Quantity available: 2

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Item no. Z87b
Light old grey Lego vintage turntable
(tray X)
Price: £2.90 each
Quantity available: 1

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Item no. Z88a
Red Lego gear selector
(tray E)
Price: £0.55 each
Quantity available: 2

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Click on image above for more connectors

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Item no. Z90
Clear translucent Lego pulley wheel
(tray B)
Price: £0.55 each
Quantity available: 2

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Item no. Z94
Dark grey/metalic disc
(tray D)
Price: £0.50 each
Quantity available: 2

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Item no. Z94a
Black disc with decal
(tray X)
Price: £0.40 each
Quantity available: 4

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Item no. Z94b
White disc with decal
(tray X)
Price: £0.40 each
Quantity available: 4

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Item no. Z94e
White disc with decal
(tray A)
Price: £0.40 each
Quantity available: 1

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Item no. Z94j
Disc with stick on decal
(tray X)
Price: £0.50 each
Quantity available: 1

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Item no. Z94k
Disc with stick on decal
(tray X)
Price: £0.50 each
Quantity available: 1

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Item no. Z94m
Disc with stick on decal
(tray X)
Price: £0.50 each
Quantity available: 1

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Item no. Z94p
Disc with stick on decal
(tray X)
Price: £0.50 each
Quantity available: 1

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Item no. Z96
Medium stone Lego pulley wheel
(tray A)
Price: £0.60 each
Quantity available: 1

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Item no. Z98
Medium Lego gear - colour jade
(tray X)
Price: £0.60 each
Quantity available: 1

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Item no. Z102e
Black gear
(tray B)
Price: £0.40 each
Quantity available: 2

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Item no. Z102f
Yellow gear
(tray E)
Price: £0.40 each
Quantity available: 4

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Item no. Z102h
formerly Z92
White lego gear
(tray C)
Price: £0.42 each
Quantity available: 3

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Item no. Z102k
Dark stone grey lego gear
(tray X)
Price: £0.70 each
Quantity available: 0

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Item no. Z100
Yellow worm gear
(tray X)
Price: £0.90 each
Quantity available: 0

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Item no. Z102
Light old grey gear arm
(tray D)
Price: £0.80 each
Quantity available: 2

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Item no. Z105a
Purple gear casing part
(tray X)
Price: £0.75 each
Quantity available: 1

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Item no. Z102B
Medium stone grey gear arm
(tray x)
Price: £0.80 each
Quantity available: 1

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Item no. Z104
Black Lego lever arm with gears
(tray C)
Price: £0.55 each
Quantity available: 2

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Item no. Z104a
White Lego lever arm with gears
(tray C)
Price: £0.60 each
Quantity available: 2

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Item no. Z104e
Orange Lego lever arm with gears
(tray A)
Price: £0.75 each
Quantity available: 1

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Item no. Z104g
Red Lego geared rocker
(tray D)
Price: £0.50 each
Quantity available: 2

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Item no. Z106
Blue gear casing part
(tray B)
Price: £0.75 each
Quantity available: 2

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Item no. Z106b
Yellow gear casing part
(tray D)
Price: £0.55 each
Quantity available: 4

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Item no. Z106d
Red gear casing part
(tray X)
Price: £0.75 each
Quantity available: 1

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Item no. Z108
Large Red Lego gear
(tray X)
Price: £1.55 each
Quantity available: 0

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Item no. Z110
Light old grey Lego gear casing
(tray X)
Price: £2.05 each
Quantity available: 1

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Item no. Z112
16 peg long black gear plate
(tray X)
Price: £2.25 each
Quantity available: 0

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Cog - item no. Z114
Dark stone grey Lego micro gear
(tray X)
Price: £0.50 each
Quantity available: 2

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Item no. Z115
Clear translucent Lego engine side
(tray E)
Price: £0.65 each
Quantity available: 2