... pipelines to convey gas,water,and oil. O Brand Two Times Galvanized Malleable Iron Pipe Fitting union gasket :1. ... Galvanized, all be antirust treatmentPackingCartons, woven bags, wooden boxesQuality Control Excellent material, precise angles, good antirust propertyProduct UsageSuitable for joining ... lines of team, gas, oil, air O Brand Two Times Galvanized Malleable Iron Pipe Fitting union gasket