Superb quality thermostatic radiator valves in a matt black powder coat finish. These corner configuration valves are generally used where pipes exit the wall. Please check your configuration prior to purchase. The black radiator thermostat valve comes with a matching lockshield and a screw-in 1/2" 20mm long radiator tail extension. These valves offer energy-saving benefits by allowing individual room temperature control. Connection size is 1/2" BSP. This product is sold as a pair.