Features: Excellent replacement for the old or broken check valve of your air compressor. The three male thread connectors are respectively for tube connecting, air pressure tanks and compressor piston pump. High quality air compressor replacement for old or damaged check valve. Convenient to install with the thread connecting ends. Compressive strength, corrosion-resistance, high-performance and high 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 Package Includes: 1x Air Compressor Check Valve note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.