... 3,Ozone resistance,aging resistance,UV resistance Rubber Metal Co-extrusionRubber Metal Co-extrusion1, Material:NBR,CR,SBR,EPDM,IIR,NR,EP ... etc.2, Hardness: Between 30~90 shore A3, Property: high/low temperature resistance,oil and fuel resistance,weathering resistance,Ozone resistance etc ...