TP973A2076: Pneumatic Thermostat, 1 or 2 Pipe, Single Setpoint, Direct Acting, 59-90 Degree Setpoint Temperature Range, 2-10 Degree Throttling Range, WallHYR Pneumatic Thermostat, 1 or 2 Pipe, Single Setpoint, Direct Acting, 59 90 Degree Setpoint Temperature Range, 2 10 Degree Throttling Range, Wall Mount, Bimetal Sensor Element, 25 Psi Maximum Operating Pressure, 0. 011 Scfm Airflow Usage, For One Pipe