Excellent durability and high efficiency check valve-This three-way check valve air compressor is pressure-resistant and corrosion-resistant, providing high performance and reliability. Three-way check valve air compressor for pipe connection-This three-way check valve is a perfect tool for air compressors and has 3 external thread connections for pipe connections, pneumatic tanks and compressor piston pumps. Designed with a convenient threaded connection end-this joint air compressor check valve is easy to install on the threaded connection end. The perfect tool for air compressor check valves-this check valve is an excellent replacement for old or check valves in air compressors. No installation tools required-this air compressor check valve threaded installation is quick and easy, and no tools are required. very happy. Applicable medium: air Pressure environment: normal pressure Thread: Nominal of external thread Weight: about 162 grams colour:Yellow Material:all copper size:Valve port: 20mm 16mm 10mm Package Contents: 2 x air compressor check valve