Product Features: - Thermostatic to ensure a constant, stable temperature - Straight radiator valve - Lockshield valve included - Gorgeous chrome finish - Easy to operate - Fantastic 10 year guarantee Thermostatic Temperature Control Thermostatic valves are fantastic for ensuring you have a constant stable temperature without any unplanned temperature rises which waste energy. The valve contains a regulating element which controls the valve opening, maintaining your desired temperature at all times. Simply twist the head to select the heat number you would like and sit back and wait for your radiator to kick into action! Straight Radiator Valves As you would imagine, straight radiator valves connect to the central heating with the radiator being straight up .