The main function of this valve is to regulate the closing and starting pressure of the air compressor. Features: Help you to save electric energy of the air compressor. High precision voltage regulation and sensitive reaction. With a ON/OFF switch lever. Users can adjust according to their actual situation. Easy to install and easy to operation. Made of fine quality material, more practical. Specifications: Material: metal + plastic Max voltage: 230V Max current: 16A Max pressure: 125psi12bar Pressure gage diameter: 40mm / 1.6in Compressor pressure switch size: 127 * 80 * 50mm / 5 * 3.1 * 2.0in Package size: 200 * 150 * 100mm / 7.9 * 5.9 * 3.9in Package weight: 640g / 1.4lb Package List: 1 * Air Compressor Pressure Switch Control Valve