Parker Brass Pipe Fitting, 90 Degree Elbow, 1/4" NPT Female X 1/4" NPT Female 90-degree elbow for changing flow direction Female National Pipe Taper (NPT) threads for connecting two male pipes Made from brass, for machinability and higher corrosion resistance than steel National Pipe Thread Taper Thread (NPT) threads for creating tighter seals than straight threads More economical than steel