75PCS/ Batch of Plastic Rack and Pinion Pulley Belt Worm Gear Single and Double Gear 8-56 Teeth

This kit includes 75 parts including gears, racks, pulleys and belt drives. Many parts are designed and produced by ourselves. There are a wide range of accessories that cannot be bought elsewhere. Experiments are necessary for scientific research, popular science activities, personal DIY models, etc. Machinery Parts,

75 gear sets, models, toys, cars, airplanes, and remote control toys can all be used. This kit includes a total of 75 parts of gears, racks, pulleys and belt drives

9 kinds of main shaft gears

11 types of crown gears

12 types of single gears

19 types of double gears

7 types of pulleys

2 types of worm gears

5 types of belts

2 connecting racks

6 PCS bushing

1 T-shirt sleeve

1 PC bevel gear