MaxLine 1/2" Inch In-Line Ball Valve This is an M8038 1/2" in-line shut off ball valve for Rapidair Maxline 1/2" tubing. This is a solid brass valve that is nickel plated to resist corrosion. This ball valve has a 175 MAX PSI working pressure, features a double O-Ring sealed compression style fittings on each end specifically designed to be used only with the 1/2" Maxline air system tubing. Specifications: Part Number: M8038 Solid brass Nickel plated 175 max PSI Double o-ring sealed For use with 1/2" MaxLine air piping system