... ,ROHS 2.Material:NR,SI,EPDM,NBR,PU,etc 3.customer's design is welcome Product/Service(We ... , EPDM, NBR, SBR, FPM, IR,, BR, IIR, PU, etc, just as your request.CertificationISO 9001:2000SGS,PAHS,LFGB,ROHS ... ,FDA,etc SizecustomizedColor allPackage5000 pcs/bag, 10000pcs/bag, or customizedQC/ ... and Specification are Accepted NBR O rings with 60-80mm