High-quality material: The faucet spool is made of full copper, which is sturdy and 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, just insert the valve into the faucet and tighten it. Temperature range is 20 - 48 degrees Celsius, override knob is 38 degrees Celsius. This valve is used with built-in thermostats and stick thermostats. If the water temperature is unstable or keeps changing from hot to cold, the thermostat needs to be replaced Colour:Brass Color Material:brass Package Contents: 1 * Faucet thermostatic valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.