9mm x 16mm Hole Size Head Size: 13mm x 20mm Stem Length: 17mm Black Nylon With Sealer Rear Light Housing Grommets Compare with: Auveco #20529, G.M. # 15284612, Car Pak # 99-8354, 998354, Barnes / Kar # CP99-8354, Disco # 10554PK, 10554B, Kent / Lawson # KT13260, Wurth # 150155761