AO Smith T104F1512 T104 Thermostatic Radiator Actuator, Automatic, High Capacity, 43 - 79 deg F, Casted Bronze Body, EPDM Seat, Nickel Plated, For Use With: V100, V2000 Model Thermostats, Includes: Sensor and Setpoint Dial ? Continually monitor and adjust room temperature for consistent comfort and relief from under he