5/16" (8mm) Hole Size Stem Length: 10mm Flange Diameter: 20mm Black Nylon Fender Push Type Retainers Compare With: Honda # 91501-TR0-003, 91501TR0003, Auveco # 21651, Disco # 12456PK, 12456B, Lawson # 1365427, Crest Midwest # CRX29472, Car-Pak # 99-9023, Wurth # 150121651, Kimball / Midwest # 13814