... materials for silicone, NBR, fluorosilicone, viton (FKM), viton DuPont and Dow elastomers, neoprene, HNBR, NBR+PVC, natural rubber, ... , meet drinking water system 2) All manufacturing processes confirm to the ISO9001, ISO14001 and NSF-61 system 3) ... support and samples 6) Customers' designs and specifications are accepted 7) Available in various sizes and colorsPacking:500pcs/bag Gaskets and Washers