... ARE STAINLESS STEEL 304, DOUBLE WALL, WITH BRAIDED INNER LINING, FLEXIBLE PIPE ALL FLEX PIPES ARE STAINLESS STEEL 304, DOUBLE WALL, WITH ... BRAIDED INNER LINING,Flexible pipewith innerbraid --WithoutnipplesDIA: 1"~6" 1 3/4", 2",2 ... " 2 3/4" 3" 3 1/2" 4" 5" 6"Flexible pipewith innerbraid andWith nipplesDIA:1"~6" 1 3/4", 2 ... 3/4" 3" 3 1/2" 4" 5" 6" Flex pipe