5/16" (8mm) Hole Size Top Head Diameter: 16mm Stem Length: 10.5mm Black Nylon With Sealer Door Trim Panel Retainers Compare with: Auveco # 21251, Car Pak # 99-8859, 998859, V.W. # 6Q0-868-243, 6Q0868243, Disco # 10916PK, 10916B, Crest / Midwest # CRX20752, Kent / Lawson # P85324, Winzer # 500.4022, Wurth # 150121251