... gas,water,and oil. Hot Dipped Galvanized Malleable Iron Pipe Fitting used plumbing materials :1.standard: EN10242,ISO7-1 , ... etc.Size18"-6"Thread StandardBS ANSI & DINFinishBlack, Eclectic Galvanized, Hot Dipped Galvanized, all be antirust treatmentPackingCartons, woven bags, wooden boxesQuality ... lines of team, gas, oil, air Hot Dipped Galvanized Malleable Iron Pipe Fitting used plumbing materials