Stud Size: 5mm Outside Diameter: 30mm Dacromet Finish Push On Type Retainers Compare with: V.W. # N90-796-502, N90796502, # N90-335-004, N90335004, Auveco # 21485, Disco # 10937PK, 10937B, Crest - Midwest # CRX20581, Kent / Lawson # 1118468