Viton O Ring 1,FDA,ROHS Certificated. 2,OEM service. 3,Ozone resistance,aging resistance,UV resistance Viton O Ring1, Material:NBR,CR,SBR,HNBR,ACM ... ,EPDM,IIR,NR, EP,Silicone,Viton etc.2, Hardness: Between ... your drawings or samples.8, OEM or ODM is welcomed Viton O Ring