Features: 1.Suitable for use as DIY toy accessories. 2.75 gear accessories, enough to handle a wide range of products. 3.Made of high quality ABS plastic material, the gears are anti-impact, scratch resistant and stable size. 4.Simple installation, easy to use. 5.Plenty of gear accessories for a long time use. specification:Item Type: Toy Accessories Material: ABS plastic Spindle Straight Teeth: 9 Kinds (80.8A 81A 81.5A 82A 102A 122A 132A 142A 182A) Crown Gear: 11 Kinds (C152A C203A C282A C282.5A C303A C322A C20082A C28082B C28102.5B C30102B C40102B) Single Layer Gear: 12 Kinds (202A 242A 242A 302A 303A 302.5A 322A 362A 402A 422A 482A 562A) Double Layer Gear: 19 Kinds (16102B 18102A 20082B 20102B 22082A 22102B 24102B 24122B 26082B 28102B 30162A 32082B 34102B 38082B 40102B 46082A 48102B 50102A) Pulley: 7 Kinds (122B 102B 62A 132A 16.82A 242AB) Worm: 2 Kinds ( W6x62A W6x82A ) Three-Way Shaft Sleeve: 1 Kind (3T-2A-2B) Loose Teeth: 1 (S162A) Motor Shaft Sleeve: 2A (2PCS) 2.5A (2PCS) 3A (2PCS) Rubber Band: 5PCS Different Color of Rubber Band Rack: 2PCS PackageList:9 x Spindle Straight Teeth11 x Crown Gear12 x Single Layer Gear19 x Double Layer Gear7 x Pulley2 x Worm1 x 3-Way Shaft Sleeve1 x Loose Tooth6 x Motor Shaft Sleeve5 x Rubber Band2 x Rack