Pressure Switch, Air Compressor, Manual Switch Action Auto/Off, (1) Port, 1/4 in FNPS, Pressure Switch Factory On/Off Setting 60/80 psi, 1/4 in Compression Pressure Switch Unloader, Pressure Switch Differential 20 psi, Pressure Switch Range 20 to 100 psi, Pressure Switch Electrical Contact Form DPST, Pressure Switch Action Standard, NEMA Rating 1, Series 9013FHG, HP @ 1 Phase - 120V 1 1/2 hp, HP @ 1 Phase - 240V 2 hp, HP @ 3 Phase - 240V 3 hp, HP @ 3 Phase - 480V 1 hp