Pneumatic Thermostat, Direct Acting, 2 Pipe, Heating and Cooling, Dual Temperature, Control Air Pressure 3 to 15 psi, Air Connections 5/32 in Barb, Max. Air Pressure 25 psi, Max. Ambient Temp. 135 Degrees F, Mounting Style Vertical, Height 2 3/32 in, Width 3 1/8 in, Depth 1 3/4 in, Temp. Control Range 55 Degrees to 85 Degrees F, Air Consumption 20 scim, Throttling Range 1 to 5 psi