... back-up rings, etc.2) Custom design rubber parts3) NSF approved materials, potable water components4 ... ) Materials include: silicone rubber, nitrile rubber, EPDM, neoprene rubber, viton DuPont & Dow elastomers, natural rubber, SBR, fluorosilicone, acrylics5 ... weathering, and has moderate oil resistance9) Precision moulded elastomer seals availableInner packing:500pcs/bag ( function(){ var aBigImageSrc ...