Features Excellent replacement for old or broken check valve--- Upgrade your air compressor with this high-quality check valve to ensure optimal performance and prevent air leaks. Three male thread connectors--- Designed for easy tube connecting and efficient airflow, providing versatility and convenience for various applications. Convenient installation--- With thread connecting ends, it's quick and hassle-free to install this check valve in your air compressor system. Durable zinc alloy construction--- Made from premium zinc alloy, this check valve is built to last, offering long-lasting reliability and resistance against corrosion. Unidirectional flow--- Ensures that air flows in only one direction, preventing backflow and maintaining consistent air pressure. 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