Pneumatic Thermostat, Heating Applications, 2 Pipe, Single Setpoint, Reverse Acting, 59-90 Degree Setpoint Temperature Range, 2-10 Degree Throttling Range ( Factory set at 4 ), 0.011 Scfm Airflow Usage, Wall Mount, Bimetal Sensor Element, 25 Psi Maximum Operating Pressure, Includes Small Wall Plate and Satin Chrome Cover