GM Door Trim Panel And Headliner Retainers Clips (GM # 2064891, 9818648, 9883583) - Package of 40 GM Door Trim Panel And Headliner Retainer Clips Top Head Diameter: 11/16", Bottom Head Diameter: 3/4" Stem Diameter: 5/16", Stem Length: 1/2" GM # 2064891, 9818648, 9883583 1971-On Pack of 40