23/64" (9mm) Hole Size Flange Diameter: 20mm Stem Length: 9mm Black Nylon Screw Type Retainers Compare with: Auveco #21010, Car Pak # 99-9017, 999017, Toyota # 90467-09166, 9046709166, Crest / Midwest # CRX20142, Disco # 10624PK, 10624B, Kent / Lawson # P85057, Winzer # 501.9017, Kimball / Midwest # 13791