... service. 3,Ozone resistance,aging resistance,UV resistance. Rubber Silicone Stopper1, Material:NBR,CR,HNBR,ACM,SBR,EPDM,IIR ... ,NR,EP,Silicone,Viton etc.2, Hardness:Between 30~90 shore A3 ... ,oil and fuel resistance,weathering resistance,Ozone resistance etc.4, Certification:ISO9001:2008,ROHS,FDA5, Packing:plastic bag& ... samples.8, OEM or ODM is welcomed. Rubber Silicone Stopper