Description Air compressor pressure switch is an extremely imperative elements, it is used to install or connect between the air compressor or the trachea, to adjust the air pressure and to switch on the energy and to switch off the motor of the compressor. The main role of this is to regulate the shutdown and start-up pressure of the air compressor. Features - Color: Assorted color.- Material: Aluminum.- Size: 7.50 x 3.80 x 3.50cm/ 2.95 x 1.49 x 1.38 inch.- Practical and durable, easy to install and disassemble. With the barometer, can be set and read the data.- With the knob, can according to need to adjust air pressure.In use it can help to save electric energy.- The assembly of all calibration shall meet the maximum flow requirement.- Please clean the port and fitting before installation, it will effectively avoid bring dust to the air path.- Make sure that the pressure gauge is tightly installed on the main body, and pay attention to whether the reading rises and falls smoothly while adjusting pressure.- Stop turning after reaching the required index and lock down the knob.Packing list: 1 x pressure regulating