& nbsp; EASY TO INSTALL: Quick and easy to install, requires no tools, it is convenient to install with the threaded connection ends. All corners and raised sharp tips of this product are carefully polished and rounded without hurting your hand. & nbsp; SAFE REPLACEMENT: Please make sure the compressor is completely stopped and pressure is fully released before replacing your check valve. GOOD PERFORMANCE: It is constructed with high strength brass with compressive strength, high performance and high reliability that does not require too much maintenance. & nbsp; APPLICATION: This is a great replacement for your old or broken check valve if it is leaking or not shutting off the airflow. Specifications: Product Name: Air Compressor Check Valve Material: zinc alloy Color: Gold Thread diameter: 9.5-10mm 16-16.5mm 20-20.5mm Total size: 42 x 39 mm Male thread: 1/2 " 3/8 " Hexagonal head size: 18 mm Note: Please allow a little size error due to manual measurement. Package included: 1 x air compressor check valve