... (FKM), viton DuPont & Dow elastomers, neoprene, HNBR, NBR + PVC, natural rubber, SBR, IR, IIR (butylrubber), CR (neoprene), SBR, AU, ACM, CO ... ) RoHS directive compliant green products5) Rapid development line, from drawing, tool design to mold support and samples 6) Customer's design ... specifications are accepted 7) Available in various sizes and colors Rubber silicone valve core