1/4" (6mm) Hole Size Head Diameter: 16mm Stem Length: 21mm Black Nylon Bumper Retainers Compare with: Auveco #19470, Honda # 90108-SW3-003, 90108SW3003, Car Pak # 98-7910, 987910, W&E # 2968, Barnes / Kar # 987910, Crest / Midwest # CRX14930, Disco # 9977PK, 9977B, Kent / Lawson # P13794, Winzer # 501.14004, Wurth # 150155538