9milelake Heat Roof Gutter De-icing Ice Snow Melter Cable Tape Kit - 20FT , with Thermostat: On6&plusmn;3 Off13&plusmn;3 38-48&deg;f On 50-61&deg;f Off Snow de-icing cable prevents winter damage to roof, gutters, and downspouts Provides uninterrupted path for melting water to flow off roof Suitable for most roof and gutter configurations; available in several lengths Easy to install; no maintenance required, With Thermostat: On63 Off133 Includes packages of clips.