Quick and easy to install, no tools required. Three Male Thread Connectors]Equipped with three male thread connectors, this check valve is designed for connecting, air pressure tank, and compressor piston pump, offering usage options Specification: Material: brass. Air Compressor Check Valve - Inline Unloading, 1/2 Male OD - TP Tools Male Threaded Check Valve 10x16x20mm Valve Air Compressor-3 Port Brass Air Compressor Male Threaded Check 3 Port Brass Check Valve Compressive resistance, corrosion resistance, high performance and high reliability. 3 Port Brass Air Compressor Check Valve, Male Threaded Tube Connector Tool Male Thread Nominal Size 10 * 16 * 20mm for Household Convenient to install with threaded connection ends. Package list: 1 x Air Compressor Check Valve