Legris 7067 56 14 Nylon Air Flow Control Valve, 90 Degree Elbow, Bi-Directional, Knob, 1/4" Tube OD x 1/4 NPT Male Flow control valve for connecting tubing to a female threaded connection at a 90-degree angle Male NPT threaded connection with O-ring on one end and push-to-connect female receiver on the other Knobbed adjustment screw for bidirectional air flow control Nylon banjo-style body for resistance to impact and nickel-plated brass threaded fitting for resistance to corrosion Maximum operating pressure of 145 psi