?Package Include?: It comes with 1 piece of black Pre-Self-regulating heating cable in 30 feet, enough length to meet various use in daily life. TIPS: Never alter or cut the length of the heating cable in any way, and never put the cable through the building walls, ceilings or floors. ?Wide Application?: Our roof heat cable is in Pre-Self-regulating temperature design, energy-saving and safe. It works with most roof and gutter configurations. It is not only used to prevent icing and ice dams on roof, gutters, downspout, road, but also prevent icing on water pipe in metal or plastic, and can used for other DIY heating as well. ?Easy to Install?: Just install the heating cable with the installation button at the right position, and then power on for use. It will Pro-Self-Regulating and generate heat, self-limiting temperature up to 65? / 149 °F. And it will never overheat even if overlapped on top of itself. It can be exposed directly to water and has no maintenance requirement. ?Heat Tape for Water Pipes, Roof and Gutters?: Our 30 feet heat cable in 1.2cm/0.47inch width is suitable for most plastic and metal water pipes. It could prevent pipe burst in winter because pipe thaw after freeze is liable to burst. It could also be used on flat roofs and metal roofs, to prevents melting snow (water) from draining off the roof and protect your roof and gutters from ice dam. ?Pro-Self-Regulating Heat Cable?: Mornajina heat tape for roof and gutters is a commercial-grade & Pro-Self-Regulating heat cable, with tough Modified Polyolefin as inner insulation and weather resistant TPE (high-low temperature) as outer jacket, 100% screen rate and tinned copper core. Safe and healthy enough, no thermostat, self-limiting temperature up to 65 degrees. Once it reaches 65? / 149 °F, it will be no longer heated. 120 volt, 8 watts/ft.