... 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, ... iron, copper, aluminium and stainless steelInner packing:500pcs/bag Rubber seals