Food Grade Silicone Rubber O Rings 1,FDA,ROHS Certificated. 2,OEM service 3,Ozone resistance,aging resistance,UV resistance NameFood Grade Silicone Rubber O RingMaterialNBR ... ,NR,EPDM,SILICONE,FKM,CR,SBR,HNBR etc.CertificationISO 9001:2008 Passd ROHS,MSDS,FDA,CTI,REACH ...