Thanks to the clear thread, you can install the air compressor check valve quickly and easily. This check valve prevents air in the tank from flowing back to the compressor and features three male threaded connectors for connection to the pipe, pressure tank, and compressor piston pump. Style 1 is made of copper and Style 2 is made of zinc alloy, both offering durable performance. The check valve measures 5cm in length, 3.5cm in width, and 3.5cm in height. The thread diameters are 10mm, 14mm, and 16mm respectively. It is an ideal replacement for old or damaged check valves on your air compressor. Item Name: Air Compressor Check Valve Material: Copper, Zinc Alloy Color: Golden Style 1: Copper Style 2: Zinc Alloy Features: Easy Installation, Clear Thread, Long Service Life Check Valve Size: 5cm x 3.5cm x 3.5cm / 1.97" x 1.38" x 1.38" (Approx.) Thread Diameter: 10mm / 0.39", 14mm / 0.55", 16mm / 0.63" (Approx.) Note: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional differences may occur due to manual measurement. Package Includes: 1 x Air Compressor Check Valve