rubber suction cup 1.Quality certificate:ISO:9001:2000 , SGS 2.good quality, ... .open mould base on drawing Size rubber suction cup according to customers' drawingMaterialEPDM, NR, SBR, NBR, Neoprene, Silicone, etcDuro40~90 Shore AColorBalck ... , every material has its advantage, EPDM-aging and weather resistance, NR-tensile strength and abrasion resistance, NBR-oil resistance and abrasion ...