NR Rubber O ring 1.Certificate: ISO9001:2008 2.Material: NR, EPDM, Silicone, etc 3.Different sizes are available Product NameNR Rubber O ringCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. High temperature resistancec. Excellent weather resistanced. Anti-aging, anti-radiation, good flexibility, good elasticitye. Excellent resistance of acids, aliphatic ...