Feature - 100% Brand new and high quality.Good accessories for Vehicle or remote control ,Provides a convenient choice for your DIY project Specification - Plastic Gears Model 102A, 10 Theeth, 0.5 Modulus, 9mm Outer diameter, 6mm Thickness, 2mm Hole Diameter Application - Plastic Crown Gears suit for science DIY project such as rc model car, model electirc 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 - 20pcs Plastic Gears White 10 Teeth Model 102A Reduction Gear Plastic Worm Gears for RC Car Robot Motors