Brass Pipe Fitting, Class 125, Reducing Coupling, 1/2" x 3/8" NPT Female These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories. Female National Pipe Taper (NPT) threads on both ends for connecting to male ends Made from brass for machinability and higher corrosion resistance than steel NPT thread for compatibility with a range of threads More economical than steel