Stem Length: 12mm Top Head Size: 17 x 20mm Bottom Head Size: 14 x 28mm Black Nylon With Metal Reinforcement Windshield Pillar & Interior Moulding Retainers Compare with: G.M. # 24405739, Auveco # 22024, Clip Lizard # 270168, Disco # 18165PK, Disco # 18165B, Crest # CRX30073, Winzer # 502.9084, Kimball / Midwest # 13843, Kent / Lawson # 1431684