Feature:1. Made of high‑strength brass and has good corrosion resistance. You can use it with confidence2. An excellent substitute for the old or damaged check valve of the Air‑Compressor to meet your needs3. Threaded connection is adopted, which is convenient for installation and tighter connection4. An indispensable part for air compressor maintenance and can be stored for a long time in a suitable working or storage environment5. The corners and raised incisive points have been carefully polished and rounded without hurting your handsSpecification:Item Type: Check ValveCommodity Material: BrassConnection Form: ThreadType: Two-wayOuter Screw: Approx. 21mm/0.83in, Approx.19mm/0.75in.Package List:1 x Check ValveNote:Before Replacing the Valve, Make Sure That the Compressor is Completely Closed and the Pressure is Completely Relieved