Product Description MD Building 64469 30ft. Roof and Gutter Heating Cable Black From the Manufacturer M-D Building Products 64469 30-foot Roof & Gutter Heating Cable is a UL and CSA approved roof and gutter cable designed to prevent ice dams and water damage. Prevents costly water damage from melting ice and snow. Use with metal vinyl or plastic gutters and downspouts. Ready to install and attachment clips are included. New low wattage energy efficient design uses up to 30% less energy than previous designs.