Product Design: The 1/2 inch x 1/2 inch npt brass fitting is an adapter for connecting two NPT female threaded pipes | Premium Materials: Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability | Wide Application: This pipe fitting can apply to water, air, gas, oil, and fuel | High Quality Threads: High quality and deep threads allow the fittings to bite better, not easy to slip | Note: This product can expose you to chemicals including lead(1.8%~3.7%), which is not allowed by federal law to be installed for potable water use in the U.S.A. and its territories