Tefen Fiberglass Polypropylene Compression Tube Fitting, Adapter, Gray, 1/4" Tube OD x 1/2" NPT Male (Pack of 5) Adapter for connecting pipes or fittings of different types Push-to-connect fitting connects to pipes or tubing on one end and has an NPT male connector on the other Made of fiberglass reinforced polypropylene for resistance to chemicals and fertilizers Working pressure of up to 200 psi For use in indoor, outdoor, and field hydraulic applications