... detailed information about AS568, JS, BS, metric o rings.Description of High Quality Standards O Ring for Chemical Resistant:1. Materials: can be standards ... o ring, HNBR, Buna, FVMQ, MVQ, ACM, FLS, CR, SBR, SI, BR, IR, EPDM, IIR, butyl, PU, E/A, ECO, CSM, VITON ... , FKM, FPM, etc.2. Characteristics: good physical and chemical properties standards o ring. 3. Hardness: 30~90 shore ...