6X Thermostat Head TRV Radiator Thermostatic Heater Control Head Heating Valve
Type:Radiator Thermostatic Head. 6x Radiator Thermostatic Heads. 5 LEVELS OF MODULATION： The zero setting ratio upper limit is 0, , 1-5. Is easy to use, if you want to turn off the thermostat, just use the modulation index arrow 0.