Pneumatic Thermostat Direct Acting and Reverse Acting 2 Pipe Heating and Cooling Single Temperature Control Air Pressure 3 to 15 psi Air Connections 5/32 in Barb Element Type Bi-Metal 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