... various pipelines to convey gas,water,and oil. O Brand Two Times Galvanized Malleable Iron Pipe Fitting union gasket :1.standard: ... , bake galv, black 4.TUV,UL5. Brand: O Product Itemcast iron pipe fitting : elbows, tees, sockets, bends, nipples, unions, crosses, flanges ... UsageSuitable for joining pipe lines of team, gas, oil, air O Brand Two Times Galvanized Malleable Iron Pipe Fitting union gasket