[Gear package]:There are 78pcs accessories in total. Includes spindle, single, double, crown gear, pulley, rack, bevel gear, copper gear, bushings, axles, tires, rubber bands and so on.
[Usage] more→: Fit for DIY car robot project and so on, which always meets different requirement. 36mm yellow pulley is with 2mm hole, rack, four-wheel drive teeth, fan teeth is 28 teeth 2mm , there are 30-100mm axles, 30mm diameter five hub wheels.
[Toy axle]: Length are 30mm, 50mm, 70mm, 100mm, shaft diameter is 2mm, 2pcs each size.
[Car wheels size]: The outer diameter is 30mm, hole is 2mm.
[Gears hole]: Most of gears are 2mm holes (tight or loose), in addition to 81.5A spindle hole is 1.5mm, there are two crown &he
