Hex bushing for connecting two pipes with different diameters, 3/8 inch Male NPT threads on one end and 1/4 inch female NPT threads on the other for connecting pipes with different ends Male NPT threads on one end and female NPT threads on the other for connecting pipes with different ends Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability, operating pressure up to 300psi, Temperature range of minus 65 degrees F to plus 212 degrees F Brass Pipe Reducing Bushings are designed for use in water, oil, natural gas, and steam applications 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