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Interlock rack made of strong plastic 200mm long.

20 sets of four different gears with axle reducers and gear rack. Injection moulded in High Impact Polyethylene for long life and quiet operation. 6mm thickness allows easy handling and alignment. For students of all ages.

10- tooth pinion gear, 27mm Ø, 1.9mm bore, (cog 12mm)

Pro gear set Gears are 6mm wide with 2.9mm bore Worms have 1.9mm bore Axles are 3mm Dia. For full contents please "Product description"

4mm to 2mm reducers Pack of 20

1 meter long sprocket chain.

Worm gear 1.9mm.