Axle Gear Set

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. Each set consists of: 1 x 10 tooth gear 10mm O.D 1.9mm Bore 1 x 20 tooth gear 20mm O.D 4.0mm Bore 1 x 30 tooth gear 30mm O.D 4.0mm Bore 1 x 40 tooth gear 40mm O.D 4.0mm Bore 3 x 4 - 3mm axle reducers 1 x 75mm Long gear racks. Smallest gear fits 2mm motor shaft.