... DuPont & Dow elastomers, neoprene, HNBR, NBR + PVC, natural rubber, SBR, IR, IIR (butyl rubber), CR (neoprene), SBR, AU, ACM, CO, etc. NSF ... -61 approved material, meets drinking water system requirements, FDA level 2) All ... specifications are accepted 7) Available in various sizes and colors Rubber hose