Anderson Metals Brass Tube Fitting, Union, 3/8" x 3/8" Flare Union for connecting and disconnecting two pipes more easily than couplings This fitting has a 45-degree flare connection on both ends Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Operating temperatures range from -65 to 250 degrees F Suitable for copper, brass, aluminum, and steel tubing 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.