Feature: *Air compressor G3/8" male NPT pipe thread x G1/2" Compression thread in tank check valve. *The G3/8" male NPT side is usually used to screw into the air tank and the G1/2" compression side is the inlet for the incoming air coming from the compressor pump. *This Valve is also equipped with a G1/8" female npt threaded port on the side for a unloader line, if your compressor does not need the unloader port it can be plugged with a G1/8" npt pipe plug. Specification: Product Name: O-ne Way Check Valve Material: Brass Color: Gold Length: (Approx. ) 62mm Thread: 16.5mm (G3/8" Male NPT) Compressor Line Input Threads: G1/2" Compression Thread Unloader Line Input Threads: G1/8" Female NPT Weight: (Approx. ) 92g Suitable for: Air Compressor Quantity: 1pc Package Includes: 1 O-ne Way Check Valve Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_