... Meet SGS,FDS,ROHS,NSF 4.OEM/ODM customized EPDM sealing ring Good factory for rubber seal ring features:1 ... . Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, SBR, CR, BR, IIR ... and samples.5. According to your drawing or samples.6. Color: black, transparent, green, red, yellow, etc7 .Hardness: ... carton outside, or as your request. customized EPDM sealing ring