It is a very smart valve for controlling water temperature. This valve is made by using a very high-quality brass for timeless and flawless functionality. Mixed water regulated at 38 Celsius Ultimate thermostatic performance to TMV Build cert standards Thermostatic control to prevent the risk of scalding The solid brass thermostatic mini valve is polished in high-quality chrome, a 3 layer PVD mirror chrome finish, creating a silky-feel surface, mirror-like sheen and are tarnish and corrosion-resistant. All four of our hand shower kits include a shower hose, a shower handset and a thermostatic mini valve. They also come with a 10 Year Warranty for peace of mind.