Feature - 100% Brand new and .Good accessories for Vehicle or remote control,Provides a convenient choice for your DIY project||Specification - Plastic Gears Model 38102B, 38 Theeth, 0.5 Modulus, 20mm Outer diameter, 5.4mm Thickness, 2mm Hole Diameter||Application - Plastic Crown Gears suit for a science DIY projects such as rc model car, model electric robot and windmill, education such as displaying how gear ratios work, and any other family small motor DIY project.||More Choose - Our store have the most complete specs gears shown in the following description, which can meet your DIY needs.||Package Content - 10pcs Plastic Gears 38 Teeth Model 38102B Reduction Gear Plastic Worm Gears for RC Car Robot Motor