4 Ports on bottom of switch. Preset to come on at 95 and cut off at 125 psi. 1/4" FPT threads and bottom unloader valve for 1/8" line. Can be used for 110 or 220 volt applications. Adjustable. Used on many electric compressors. (picture does not show 4 port) Model 9013FHG-14J52MIX
4 Ports on bottom of switch. Preset to come on at 95 and cut off at 125 psi. 1/4" FPT thread (...see more)