75PCS/lot Plastic Gear,Rack, Pulley, Belt,Worm Gear,Single-and Double-gear,8-56 Teeth Diy Kit
 
This package including gear, rack, pulley and belt drive a total of 75 parts.  Applications include; scientific research, popular science activities, personal diy models such as the necessary machinery accessories,
 75 kinds of gear package, It can be used whether model, toys, cars, planes, remote control toys. This package including gear, rack, pulley and belt drive a total of 75 parts
 
 9 kind of Spindle gear
 11 kind of Crown gear
 12 kind of Single gear
 19 kind of Double gear
 7 kind of Belt pulley
 2 kind of Worm gear
 5 kind of Belt
 2 PCS Connect rack
 6 PCS Axle sleeve
 1 PC Tee Axle Sleeve
 1 PC Bevel gear