... our introducing info below:rubber seal 1.Rubber seal materials advice 2.According to sample or drawing 3.Precisely mold design ... 4.OEM/ODM is welcomedrubber seal features:1. Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, SBR, CR ... : we offer the mold design prior to mold making, materials advice and we test samples , then run mass production. Mold/samples ...