2 Pack Brass 1/2" PEX to 1/2" Hose Barb Connector Fitting Reducer Splicer Adapter for Water/Fuel/Air Connections: Hose Barb x PEX Pipe Size: 1/2" Barbed x 1/2" PEX Material: Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Temperatures range from -40 to 160 F Adapter for connecting a hose to a pipe connection of a different diameter