Cable helps prevent damage by ice build-up in gutters, downspouts, and under shingles. Cable maintains a clear path for water drainage. Installs easily with special clips to hold cable securely to roof without damage. Spacers and instructions in each package. Preassembled in several lengths. Can be used with roof de-icing control, model No. RS2. 5W per foot, 120V. Approved for metal and PVC gutters. UL listed.