Dixon HB2075 Iron 150# Pipe and Welding Fitting, Reducer Hex Bushing, 2" NPT Male x 3/4" NPT Female Bushing for connecting two pipes of different sizes Male and female National Pipe Taper (NPT) threads for connecting female pipe to male pipe Malleable iron for high tensile strength Maximum operating pressure of 150 psi American National Standards Institute (ANSI) Class 150 for quality assurance