SODIAL(R) 20 Pcs 8mm Hole Plastic Push Screw Rivet Fairing Panel Fixings Clips Product Name : Plastic Rivet;Material : Plastic Color : Black;Max. Diameter : 20mm/0.79" Stem Length : 21mm/0.83";Fit Hole Diameter : 8mm/0.31"(Not Including The Pin) Before Expansion : Stem Diameter: 8mm/0.31",Height: 36mm/1.42";After Expansion : Stem Diameter: 12mm/0.47",Height: 23mm/0.91" Net Weight : 41g