FURNAS REPLACEMENT AIR COMPRESSOR PRESSURE SWITCH. FOUR PORT. 95-125 PSI FURNAS REPLACEMENT PRESSURE SWITCH 95 PSI ON & 125 PSI OFF FOUR PORT UNLOADER VALVE ON/OFF METAL LEVER. 120 / 240 VOLT THIS IS A REPLACEMENT PRESSURE SWITCH FOR FURNAS BRAND / NOT OEM FURNAS PAC#: 69MB7LY2C / LF10-L4 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. 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