... . 2,OEM service. 3,Ozone resistance,aging resistance,UV resistance Viton Rubber O Ring:1, Material :NBR,CR,HNBR, ACM,SBR,EPDM ... ,IIR ,NR, EP,Silicone,Viton etc.2, Hardness: Between 30~90 shore A3, Property:high ... your drawings or samples.8, OEM or ODM is welcomed Viton Rubber O Ring