High Quality: The thermostat head is made of plastic and alloy, which is not easily deformed or damaged. Convenient to use and durable. Reset Ratio Upper Limit: 0, *, 1-5. 5 modulation levels, easy to install. If you want to turn off the faucet, screw it in until the arrow points to 0. Thermostatic taps suitable for taps with M30 x 1.5 threaded connections and M30 x 1.5 threaded connections from radiator manufacturers. Frost Protection: Thermostatic valves with frost protection and regulation function. The integrated frost protection allows the use of this thermostat head even in cold areas and prevents the radiator from freezing. No Fixed Temperature Setting Range: This thermostatic radiator valve, affected by temperature and ambient temperature, can detect changes in outdoor temperature. Advantage: High-definition internal structure design, the control knob is marked with a scale that can control the internal temperature according to your needs. Thermostatic valves are widely used for water, non-corrosive liquids, and non-flammable gases.