... Excellent chemical and physical property 3 RoHS directive 1) Available material: materials for silicone, NBR, fluorosilicone,viton (FKM), viton DuPont & Dow ... ), CR (neoprene), SBR, AU, ACM, CO, etc. NSF-61 approved material, meets drinking water system requirements2) All manufacturing processes confirm to ... are accepted 7) Available in various sizes and colors Extension pipe rubber