Air Pressure Switch, Application Industrial HVAC, Contact Form SPDT, Electrical Rating 10 A @ 125V AC, 125 VA Pilot Duty @ 125 to 250V AC, 5 A @ 250V AC, Housing Color Blue, Housing Material Aluminum, Input Voltage 125V AC, 250V AC, Maximum Operating Temperature 140 Degrees F, Maximum Pressure Rating 3 psi, Maximum Pressure Setting 1.7 in wc, Minimum Operating Temperature -20 Degrees F, Minimum Pressure Setting 0.07 in wc, Mounting Hole Diameter 1/4 in, 5/16 in, Pressure Type Differential