... . 2,OEM service. 3,Ozone resistance,aging resistance,UV resistance. High Temperature Rubber O Ring1, Material:NBR,CR,SBR,EPDM,IIR,HNBR,ACM ... etc.2, Hardness:Between 30~90 shore A3, Property: high/low temperature resistance,oil and fuel resistance,weathering resistance,Ozone resistance etc ...