Manufactured to BS EN215 uniquely for Castrads. 15mm compression fitting to half inch BSP tapered thread. Finished entirely in Chrome, pair with chrome shrouds and base plates to cover your copper pipes and the hole in the floor to complete the look. Thermostatic operation for energy efficiency as recommended by the Energy Saving Trust. 5 year guarantee. These valves will fit most styles of radiator including steel panel, column, cast iron and bathroom towel radiators.