Single Hole Pressure Switch Bracket Pressure Gauge Safety Barma Valve Control Valve RegulatorIt can easily adjust the air compressor to control the pressure and is low power consumption. Right red is the safety valve. The air regulator on both sides of the copper is an exhaust valve that opens the gas when used. Air compressor pressure valve switch features high accuracy and quick response, 30% higher than that of traditional diaphragm type, Piston structure. The main function of the valve is to adjust the air compressor to close and start the pressure. Package:1pcs Bama bracket (one safety valve and two bleed valves),1 point 2pcs plastic pressure gauge with one single hole pressure switch,the thread on the bracket connected to the gas tank is 4 points,20MM. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.