Crimp cap, 20 mm, aluminum, open center, silver aluminum, Chromacol 20-ACB, pkg of 100 ea 20 mm Expand 27232 Stoppers, stopper diam. 20 mm, gray butyl rubber, pkg of 100 ea 20 mm Expand 27235-U Stoppers, stopper diam. 20 mm, silicone, pkg of 100 ea 20 mm Expand 27234 Stoppers, stopper diam. 20 mm, red rubber (Isoprene rubber), pkg of 100 ea 20 mm