Thermostatic Radiator Valve Actuator; Type Rotary; Size 2-1/8" Diameter x 2-31/32" Width x 1-13/16" Height; Operating Temperature 48 to 79 Deg F; Application Thermostatic Radiator Valve, Convector, Heating Unit; Inclusion/Features Remote Sensor, Set point Dial and Valve, 16' Capillary Tube, No Terminal Type; Collar Size 1-3/16" Diameter; Used with V100, V200 Valve