... DuPont & Dow elastomers, neoprene, HNBR, NBR + PVC, natural rubber, SBR, IR, IIR (butyl rubber), CR (neoprene), SBR, AU, ACM, CO, etc. NSF ... , tool design to mold support and samples 6) Customers' design and specifications are accepted 7) Available in various sizes and colors Rubber hose