... Features:1. Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, SBR, CR, BR, IIR, NR, etc),as your request , Environmental ... gasket features:1. Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, SBR, CR, BR, IIR, NR, etc),as your request ... inside, strength carton outside, or as your request. OEM molded rubber products