Our SRF-RG self-regulating heating cable provides reliable freeze protection of roofs and gutters. Because SRF-RG is self-regulating, it automatically adjusts to the appropriate heat output as ambient conditions change, making it both energy efficient and cost effective. The protective waterproof outer jacket is suitable for wet applications in downspouts and roof drains. This Prepack Cable includes a GFCI plug and 15 roof clips for use with asphalt shingles. Roof materials other than asphalt shingles may require the use of different clips than what are provided.