This lagging jacket fits a 4 gallon central heating/cold water tank measuring 18\"x12\"x12\". It is made of durable material and was manufactured in the United Kingdom. The jacket is designed to keep your tank insulated and conserve energy, while also protecting it from potential damage. Ideal for those looking to improve their home plumbing and fixtures, this lagging jacket is a practical solution for any household. Whether you're looking to reduce your energy bills or simply protect your tank, this jacket is a great investment. Add it to your cart today and enjoy the benefits of a well-insulated tank.