Available in three, six, nine, twelve, and fifteen foot incements. Pre-assembled and ready-to install, the cable prevents pipes from freezing, keeping water flowing to -40 degrees, using an energy-saving thermost. Will accommodate pipe diameters up to 1-1/2 inches. Simply run the cable straight along the pipe and valves according to the included instructions, affix with premium application tape and insulation, then plug into a ground fault protected electrical outlet.