Hole Size: 5/16" (8mm) Stem Length: 13mm Flange Diameter: 20mm Black Nylon Bumper, Engine Cover, Fender & Quarter Panel Push Type Retainers Compare with: Mazda # B45A-56-146A Toyota # 90118-WB048, Auveco # 22424, Disco # 18234PK, Disco # 18234B