This 200-piece mixed plastic gear set includes assorted spur gears, double-layer gears and shaft sleeves for STEM experiments, DIY robot cars, RC models, craft ornaments and toy repair parts. Made of lightweight solid white plastic, these quiet, low-friction gears adopt unified modulus for freely building speed-up and reduction transmission structures. Great teaching aids for kids to learn mechanical principles, ideal hobby supplies for model refitting, clock mechanisms and small automated device assembly. Complete mixed sizes satisfy all kinds of homemade mechanical project needs, a handy replacement kit for damaged electric toys and remote control car gearboxes.
