... , NBR, fluorosilicone, viton (FKM), viton 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 ... directive compliant green products 5) Rapid development line, from drawing, tool design to mold support and samples 6 ... colors Outer packing: 100pcs/ctn Rubber Sheets