ITEM NAME:20pcs Universal Black Silicone Wheel Lugs Nuts Bolts Covers Protective Caps A9D3 20pcs Universal Black Silicone Wheel Lugs Nuts Bolts Covers Protective Caps A9D3 These caps fit any 21mm car wheel bolts or nut. Protects the bolt heads from corrosion. Improve your car exterior appearance. Easy to assemble, simply push down on your bolts for secure attachment. Easy installation, perfect replacement. Installation instructions: Clean the car wheel hub screw area with a towel before installation. Apply solid adhesive directly to the wheel hub screw cover, then complete the installation. Material: Silicone Color: Black Dimension: 27 x 21mm (L D) Type: Screw Cap Wheels Hexagonal Size: 21mm / 2.1cm Package contents: 20 x screw cap Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.