... o ring 1.Silicone FKM FPM VITON A VITON B GF GFLT GLT AFLAS HNBR... 2.High price performance ratio 3 ... nameFlat o ring MaterialSilicone,,FKM,FPM,VITON A, VITON B, GF,GFLT,GLT,AFLAS,HNBR... ColorRed, blue, pink,white, black, any ... DHL/FEDEX/UPS express fee will be on the buyer's account.2.For large quantity, deliver by sea. Delivery ... flat o ring HNBR FKM FPM VITON A VITON B GF GFLT GLT AFLAS