... , SI, EPDM, NBR, SBR, FPM, IR,, BR, IIR, PU, etc, just as your request.CertificationISO 9001:2000SGS,PAHS,LFGB,ROHS,FDA ... c. Excellent weather resistance d. Anti-aging, anti-radiation, good flexibility, good elasticity e. Excellent resistance of acids, aliphatic hydrocarbons, aromatic hydrocarbons ... .Designs and Specification are Accepted RUBBER O ring seal with good quality (20-40mm)