AIR COMPRESSOR PRESSURE CONTROL SWITCH 120-230 VOLT 95-125 PSI ADJUSTABLE 4 PORT REPLACEMENT PRESSURE SWITCH 95 PSI ON & 125 PSI OFF FOUR PORT UNLOADER VALVE ON/OFF METAL LEVER CAP# 4L-01FL This switch comes on many single stage air compressors. Please review the specs to ensure proper fit. One side has a pressure release unloader valve for 1/4" compression tube. This switch is the suitable replacement for the Furnas Hubbell Model 69MB7LY2C. It is factory set at 95 PSI on and 125 PSI off and is adjustable. Rated at 20 AMP, 120 volt. UR and CSA approved. The bottom side has four 1/4" FPT ports. One for tank pressure One for pressure relief valve Other two for gauge and pressure outlet