... ring 2.various material 3.good sealing,oil resistance 4.high breaking elongation 5.various size Various material & size rubber ... , pumps, mixers, agitators, blenders, pharmaceutical & foods. 1) Material:NBR,CR,SBR,HNBR,ACM,EPDM,IIR,NR, EP,Silicone ... 90 shore A3)Property:high/low temperature resistance,oil and fuel resistance,weathering resistance,Ozone resistance etc.4) Certification:ISO9001:2008,ROHS ...