Low carbon steel construction with long lifespan and high heat output. Larger water capacity to provide more heat. Can be use on all UK heating systems(tank fed or combi systems etc.), no valves included.BTU Rating: 2395-2878 Tested to BS EN442 standards and complies with ISO9001:2008 regulations. All rails come with manufacturer-leading 15 year guarantee., Weight: 37.6108618972 Pounds, Manufacturer: Manufactured for Right Radiator