Features: 1) Available materials: materials for silicone, NBR, fluorosilicone, viton (FKM), vi Features:1) Available materials: materials for silicone, NBR, fluorosilicone, viton (FKM), viton DuPont and Dow elastomers, neoprene, HNBR, NBR+PVC, natural rubber, SBR, IR, IIR (butyl rubber), CR (neoprene), SBR, AU, ACM, CO; NSF-61 approved material, meet drinking water system 2) All manufacturing ...