FKM O-Ring 1.Material:FKM 2.Any colors and sizes 3.Excellent Heat resistance,Chemical resistance 4.Pay by:T/T FKM O-Ring1.Material:FKM2.Any colors and sizes3.Excellent Heat resistance, Excellent Chemical resistance4.Pay by:T/T PEEK washer with Excellent Heat resistance,Excellent Chemical resistance,Self-lubrication.Website:www.gz-best.com. FKM O-Ring