As a manufactory we can supply all kinds of rubber washers for you . Detailed Product Description Features:1) Available material: materials for silicone, NBR, fluorosilicone,viton (FKM), viton DuPont & Dow elastomers, neoprene, HNBR, NBR + PVC, natural rubber, SBR, IR, IIR (butylrubber), CR (neoprene), SBR, AU, ACM, CO, etc. NSF-61 approved material, meet drinking water system requirements 2) All ...