Check the listing for details. 20 Pack 12 Teeth Plastic Gears Model Reduction Gear Plastic Worm Gears. Condition: New. Listed at 8.84 USD. APPLICATION: Plastic Gears suit science DIY projects such as RC model cars, model electric robots, education such as displaying how gear ratios work, and any other family small motor DIY project.ADVANTAGES:1. The plastic gear is made of plastic and long service life.2. Easy to use, great model-making accessories for all kinds of cars, robots, etc.3. The products are for DIY model spindle gear spare parts, suitable for DIY model technology production. They are also good replacement parts for old or broken gears.PACKAGE CONTENT: Modulus: 0.5Teeth: 12Outer Diameter: 7mm/0.28 inchHole Diameter: 2.5mm/0.1 inchThickness: 5mm/0.2 inchColor: White20 Pack of Plastic GearNOTE:Please carefully check whether the product information meets your requirements before purchasing.