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, safety 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 replacedColour:Brass ColorMaterial:brassPackage Contents:1 * Thermostatic faucet 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.