Thermostatic Valve: Top dial diverter controls water to 1 outlet, Bottom dial - temperature control, High Quality Design, Chrome Finish, Thermostatically controlled, Manufactured from highly durable brass, Operating range 20 - 50 deg C with 38 deg C safety button, Built in non return valves to prevent back flow and filters to protect the thermostatic mechanism, Chosen temperature maintained to within +/-1C, Pre-set maximum temperature, Automatic shut off in event of water cold supply failure, UK standard size fitting