... , NBR, EPDM, etc 3.Water resistant, environmental Product Name Nbr o-ringCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone and chemical resistanceb. High temperature ... oilSizeWe can provide you with many different sizes of rubber rings, according to your drawing or samplesMatetialNBR, NR ,EPDM ,SBR ,SR ...