Size : 1/8 BSPT Male to 1/4 NPT Female Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Working Pressure : Maximum operating pressure of 1,200 psi Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F) 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.