Bluemoona 78 pcs - Plastic Gear Pulley Belt Shaft Assortment for Robot Motor Wor

Axle? 8pcs 30mm x 2pcs 50mm x 2pcs 70mmx 2pcs 100mm x2pcs Wheel: 4pcs outer diameter 30mm, bore 2mm Yellow Gearwheel: 36mm Crown gear: 2.5mm x 2, 3mm (C303A) x 1 Axle length of 30mm, 50mm, 70mm, 100mm, shaft diameter is 2mm, the two Five wheel...