Features: An excellent substitute for the old or broken check valve of your air compressor. The three male thread connectors are specifically designed for tube connecting, air pressure tanks, and compressor piston pumps. High quality replacement for old or damaged check valves in air compressors. Easy to install with the threaded ends for connection. Offers compressive strength, corrosion resistance, high performance, and reliability. Specifications: Material: Brass/Zinc-Alloy Zinc-Air Compressor Check Valve Male Thread Size: Approx. 20x19x10mm Zinc-Air Compressor Check Valve DN: 52mm Zinc-Air Compressor Check Valve PN: 0.84MPa Brass Air Compressor Check Valve Male Thread Size: Approx. 20x19x10mm Brass Air Compressor Check Valve DN: DN3/2mm Brass Air Compressor Check Valve PN: 0.83MPa Brass Air Compressor Check Valve Heat Sink Male Thread Size: Approx. 20x20x10mm Brass Air Compressor Check Valve Heat Sink DN: DN1mm Brass Air Compressor Check Valve Heat Sink PN: 0.79MPa Note: Please allow 1-2cm errors due to manual measurement; ensure that you do not mind before placing an order. Due to variations among different monitors, the picture may not accurately reflect the actual color of the item. Thank you for your understanding. Package includes: 1x Air Compressor Check Valve