This gear pack contains axles, tires, gears, bushings, copper gears, bevel gears, racks, 2.3 gears, 3.17 gears, spindles, single-layer, double-layer, crown gears, pulleys, racks, bevel gears, copper gears Bushings, axles, tires, rubber bands, etc. Pack quantity: 78pcs, actual type: 71 (because there are 4 tires inside and 2 axles each, this is for DIY production) The special gears are: 36mm yellow 2mm hole pulley, rack, four-wheel drive stacked teeth, 28 tooth hole 2mm fan teeth, and 30-100mm axle, 30mm outer diameter five wheel hub wheels! The axle lengths are 30mm, 50mm, 70mm, and 100mm, and the shaft diameter is 2mm, two each. Five-spoke wheels: outer diameter 30mm, inner hole 2mm Most gears are 2mm bores (close fit or loose fit), except for one 81. Spindle hole is 1.5mm, two crowns are 2.5mm, one crown gear C303A is 3mm, and one 15 tooth 2.3 mm hole and 3.17mm hole. This is just the accessories we match, as much as possible for everyone to use DIY. But you can't use this to make a car directly. We only provide car accessories. You must have your own ideas, such as frame, screws, etc. Package Includes: 1 set of gear kit The product will be upgraded constantly, the appearance and color may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. EU Responsible Persons information: Name: PI NETWORK SARL Address:38 rue Dunois 75647 Paris CEDEX 13,75013,FR E-mail:friedlichrichter@outlook.com This merchant is committed to only offering products that comply with the General Product Safety Regulation.