Hole Size: 5/16" (8mm) Stem Length: 11.50mm Top Head Size: 10 x 10mm Black Nylon With Sealer Wheel Arch Protective Push Type Retainers Compare with: Honda # 91513-T0A-A01, Auveco # 22463, Clip Lizard # 270443, Disco # 18250PK, Disco # 18250B