Key features

• •This gear is covered with a more comprehensive, spindle, single, double, crown gear, pulley, rack, bevel gear, copper gear, bushings, axles, tires, rubber bands and so on
• •The most distinctive gear is: 36MM yellow 2mm hole pulley, rack, four-wheel drive teeth, 28 teeth 2mm fan teeth, there are 30-100mm axles, 30mm diameter wheel wheel five wheels!
• •Axle length of 30mm, 50mm, 70mm, 100mm, shaft diameter is 2mm, the two.
• •Five wheel wheels: 4 outer diameter 30mm, bore 2mm ,.
• •Gears are mostly 2mm aperture (tight or loose), in addition to a 81.5A spindle hole is 1.5mm, there are two crown is 2.5mm, there is a crown gear C303A is 3mm, a 15 teeth 2.3mm hole and 3.17mm hole.