Fitment :  Astro & Safari Mini-Vans 1985-On, GM 1983-On Include : 20CLIPS A PACK Part No:  15588024, 15596301  10073833, 15600382, 20421800 Material :  Nylon Size :  Top Head Diameter 9/32" x 19/32" (7.2mm x 15mm)  Bottom Head Diameter 3/4" x 7/8" (19mm x 22mm)  Stem Diameter 5/16" (8.1mm)  Stem Length 3/4" (19mm)