7.5mm Hole Size Head Diameter: 18mm Stem Length: 32mm Black Nylon Cowl Vent Retainers Compare with: Auveco #20761, Ford # W710312-S300, W710312S300, Car Pak # 99-8490, 998490, Barnes / Kar # CP99-8490, CP998490, Disco # 10517PK, 10517B, Kent / Lawson # KT13464, Winzer # 502.4190