5/16" (8mm) Hole Size Flange Diameter: 18.5mm Stem Length: 21mm Black Nylon Rear Bumper with Sealer Push Type Retainer Compare with: Auveco #20768, Chrysler # 4806240AA, # 4806240AB, Car Pak # 99-8513, 998513, Barnes / Kar # 99-8513, Crest / Midwest # 4806240AA, Disco # 10503PK, 10503B, Kent / Lawson # KT13541, Winzer # 502.5149, Kimball / Midwest # 13695