Anvil 8700127353, Malleable Iron Pipe Fitting, 90 Degree Street Elbow, 3/4" NPT Male x NPT Female, Black Finish 90-degree elbow for changing flow direction Male and female National Pipe Taper (NPT) threads for connecting two pipes Made from malleable iron for use with gas, oil, and water applications National Pipe Taper (NPT) threads for creating tighter seals than straight threads Black finish helps resist rust in oil and gas applications