Features Perfect Accessories: The Three-Way Air Compressor Check Valve Is Ideal for Replacing Old Or Damaged Air Compressor Check Valves. Both Ends Are Threaded for Easy Installation. Threaded Connections: One-Way Brass Check Valve Three External Threaded Connections for Pipe Connections, Pressure Tanks And Compressor Piston Pumps. Detachable Design: The Air Compressor Check Valve Adopts A Detachable Design, Which Facilitates Internal Cleaning, Makes It Easier And Healthier to Use, And Is Durable And Long-Lasting. High-Quality Performance: One-Way Brass Check Valve Is Pressure-Resistant, Corrosion-Resistant And Highly Reliable. All Corners And Raised Sharp Points of This Product Are Carefully Polished And Rounded So They Won'T Hurt Your Hands. Easy Installation: The Three-Way Air Compressor Check Valve Is Quick And Easy to Install without Any Tools. 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