Ⅰ. Thermostatic radiator head: The 4-piece thermostatic radiator head has a 30 x 1.5 mm thread connection, which is suitable for the 30 x 1.5 mm thread connection provided by the radiator manufacturer. The temperature controller head is made of materials and is not easily deformed or damaged. Easy to use and has a long service life. Ⅱ. No fixed temperature adjustment range: The thermostatic radiator valve is affected by the heating temperature and room temperature, and can sense the changes in the outdoor temperature. No fixed temperature adjustment range. Ⅲ. Some features: TRV head heater valve with antifreeze and regulation function, widely used in water, non-corrosive liquid, non-flammable gas. Ⅳ. Note: Please confirm whether this Single thermostatic head is suitable for your faucet before purchasing. The control knob is marked with a scale, and the internal temperature can be adjusted according to your needs. Ⅴ. Product Description Features: 1. TRV constant temperature radiator, 5-speed adjustment, easy to install. If you need to turn off the thermostat, just use the modulation arrow 0. 2. Compact radiator, suitable for built-in valve blocks. Connection thread: M30 x 1.5. 3. Provide a delicate white or full chrome model with a chrome-plated sensor that complements the radiator and towel rail 4. Ultra-thin manufacturing technology. Ⅵ. Specifications: Material: plastic + alloy Connection thread: M30 x 1.5 Liquid sensor (hydraulic sensor) output: AC 230V; 50 Hz Setpoint range: 6-28 degrees Celsius Temperature hysteresis: 1.0 K Maximum operating pressure: 10 bar Ⅶ. The radiator head with frost protection and regulation functions can help you regulate. It is made of materials, durable and comfortable to use. The control knob is marked with a scale, which can adjust the internal temperature according to your needs. The thermostatic radiator head is made of brass, steel and plastic, which is not easy to deform or damage. Ⅷ. Thermostatic radiator valve: 4 x thermostatic radiator head