rubber o ring,high quality,wide temprature range,odorless SRgood resilience ... .SBRhigh tensile strengh,abrasion resistance,heat resistance,ozone resistance,acid resistance,alkali resistance,alkali resistance,good flex performamnce at ... tensile strength,good tearing property,abrasion resistance,heat resistance,acid resistance,alkali resistance.FPMhigh tensile strength,good tearing property,no ...