... 1,FDA,ROHS certificated. 2,OEM service. 3,Ozone resistance,aging resistance,UV resistance Rubber Valve Product1, Material:NBR,CR,SBR,EPDM,IIR,NR ... 30~90 shore A3, Property: high/low temperature resistance,oil and fuel resistance,weathering resistance,Ozone resistance etc.4, Certification:ISO9001:2008, ROHS,FDA5 ...