9/32" (7.1mm) Hole Size Stem Length: 17mm Head Diameter: 28mm Black Nylon Hood Insulation Retainers Compare with: G.M. # 1598943, Disco # 12072PK, 12072B, Auveco # 21380, Car-Pak # 99-8795, 998795, Kent / Lawson # P85271, Winzer # 502.87.95, S&R # 416161