Features Made of high‑strength brass and has good corrosion resistance. You can use it with confidence. An excellent substitute for the old or damaged check valve of the Air‑Compressor to meet your needs. Threaded connection is adopted, which is convenient for installation and tighter connection. An indispensable part for air compressor maintenance and can be stored for a long time in a suitable working or storage environment. The corners and raised incisive points have been carefully polished and rounded without hurting your hands. Specification: Item Type: Check Valve Commodity Material: Brass Connection Form: Thread Type: Two-way Outer Screw: Approx. 21mm/0.83in, Approx.19mm/0.75in Package List:1 x Check Valve Note:Before Replacing the Valve, Make Sure That the Compressor is Completely Closed and the Pressure is Completely Relieved Package List 1 x Check Valve