ThermAll energy saving Radiator Heat Reflector offer buyers the added benefit of 1.5mm foam backed foil for greater heat reflection Radiators located on an external wall can lose up to 30% of their heat by warming the wall which simply goes outside. Installing specially-treated radiator foil can prevent this as the heat is reflected back into the room It only takes minutes to fit! Simply measure your radiator, cut the roll to size, either apply glue or double sided sticky tape to the rear of the foil and attach to the wall behind the radiator. Invisible once installed This 5 metre roll is enough to do 3-4 standard sized radiators. Improves room heat and saves money Overall Length: 5000 mm / 196.85 inches / Overall Width: 500 mm / 19.69 inches / Thickness: 1.5 mm / 0.06 inches, Manufacturer: ThermAll