... 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, NR, etc),as your request ... orders are welcome, logo and NO. as your request.Technical service: we offer the mold design ... inside, strength carton outside, or as your request. customized EPDM sealing ring