Specification: 111.5mm - 121.5mm/91.5mm - 101.5mm Projection from the wall, 350mm/450mm/550mm Pipe Centres, 10 bar Maximum Working Pressure, CE Certified/BS EN 442, 15mm (1/2") Inlets, 5 Years (Radiator) - 1 Year (Element) Guarantee. Size : H600mm x W400mm - Curved = 427 BTU's | 125 Watts | 6kg --- H600mm x W500mm - Curved = 532 BTU's | 156 Watts | 6kg --- H600mm x W600mm - Curved = 641 BTU's | 188 Watts | 6kg --- H800mm x W400mm - Curved = 556 BTU's | 163 Watts | 5kg --- H800mm x W500mm - Curved = 693 BTU's | 203 Watts | 6kg --- H800mm x W600mm - Curved = 833 BTU's | 244 Watts | 7kg --- H1000mm x W400mm - Curved = 689 BTU's | 202 Watts | 6kg --- H1000mm x W500mm - Curved = 863 BTU's | 253 Watts | 7kg --- H1000mm x W600mm - Curved = 1037 BTU's | 304 Watts | 8kg --- H1200mm x W400mm -.