Features THREE-WAY AIR COMPRESSOR VALVE: The best replacement for your old or broken check valve for your air compressor; convenient installation using threaded connection end, quick and easy installation without any tools, high performance and high reliability. THREE-WAY AIR COMPRESSOR VALVE: Three threads for pipe connection, air pressure tank and compressor piston pump respectively. HIGH QUALITY MATERIAL: Air compressor valve is made of high quality zinc alloy material; high compressive strength, corrosion resistance, good performance and high reliability COMPATIBILITY: Male thread size: 1/2" 3/8"; Thread diameter: 9.5-10mm 16-16.5mm 20-20.5mm; Hexagonal head size: 18mm; Overall size: 42 x 39mm; Please check for compatibility before purchase SERVICE GUARANTEE: We offer 24 months worry-free warranty, if you have any problem with our equipment, please feel free to contact us and our staff will reply within 24 hours. You can buy with confidence. 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. Convenient to install with the thread connecting ends. Specifications: Product Name: Air compressor Check Valve Material: Zinc Alloy Color: Golden Thread Diameter: 9.5-10mm 16-16.5mm  20-20.5mm Total Size: 42 x 39mm Male Thread Size: 1/2" 3/8" Hex Head Size: 18mm Note: Please allow a little size error due to manual measurement. Package Included: 1 x Air Compressor Check Valve Package List