... competitive price various shape and size rubber ring 1. High quality with very systematic quality system, ISO 9001 and ISO TS 16949.2 ... 3. More than 20 years experience in rubber industry, and good production machine and good R&D center.4. Material: NR, SBR ... , BR, EPDM, NBR, CR, FKM, Silicone, quality meets US and EURO environmental friendly.5. Different pressure requirement are available. , rubber ...