Features: *High quality aluminum alloy material high strength and durability. *Excellent replacement for the old or broken check valve of your air compressor. *The 3 male thread connectors are respectively for tube connecting air. * thread connector is for tube connecting and the other thread connectors are for air pressure tank and compressor piston pump. *Convenient to install with the thread connecting ends. Specifications: *Material: Aluminum alloy *Color: Silver *Male Thread Diameter: 20mm/16mm/10mm *Quantity: 1Pc Package Contents: 1*Air compressor check valve Note: 1. 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. 2. Please allow slight manual measurement deviation for the data.