Features: Install any wheel with a 17 mm bolt or nut. Simply push the bolt down to fit it securely. Enhance the smoothness of the wheel. Protect the bolt head from corrosion. Different colors for you to choose, make the exterior of your car more beautiful. Specifications: Size: Black(optional) Material: ABS plastic Standard: 17mm Package size: 16152cm/6.35.90.8cm Weight: 45g/1.58oz Package List: 20 * 17mm Nut Caps 1 * Removal Tool