Package content: 20 black plastic wheel nut covers and 1 removal clip. Fitment: 21mm wide, 24mm deep, fits any 21mm car wheel bolt or nut. Function: Protect your wheel nuts from corrosion and cover unsightly rust, keep your car wheel finish. Easy installation: just press the nut covers directly onto the bolts and easy to clean. Excellent material: high quality plastic, wear-resistant, comfortable to touch.