... ,OEM service. 3,Ozone resistance,aging resistance,UV resistance Rubber Pump Cover1, Material:NBR,CR,SBR,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 ...