NR molded rubber parts with Bule colour 1) Available material: silicone, NBR, fluorosilicone, viton (FKM), viton DuPont and Dow elastomers, neoprene, HNBR, NBR+PVC, natural rubber, SBR, IR, IIR(butyl rubber), CR (neoprene), SBR, AU, ACM, CO, NSF-61 approved material, meet drinking water system 2) Excellent chemical and physical..