Dixon Valve & Coupling SE2F2M Extruded Brass Pipe and Welding Fitting, 90 Degree Street Elbow, 1/4" NPTF Female x 1/4" NPTF Male Elbow for changing flow direction Male and female National Pipe Taper (NPT) threads for connecting female pipe to male pipe Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Street elbow design allows direct pipe connection without needing a pipe nipple For use in air, water, oil, and natural gas applications