High-quality material: The faucet cartridge is made of full copper, which is sturdy and suitable for long-term use. DURABILITY AND VALUE: Faucet cartridges are manufactured with exceptional quality and value in mind. Easy installation: No need to drill holes in the faucet; simply insert the valve into the faucet and tighten it. Temperature range: 20 - 48 degrees Celsius; safety override knob set at 38 degrees Celsius. This valve is compatible with built-in thermostats and stick thermostats. If the water temperature is unstable or fluctuates between hot and cold, the thermostat may need to be replaced. Color: Brass Material: Brass Package Contents: 1 x Thermostatic faucet Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement error allowance is +/- 1-3 cm.