EasyHeat® PSR is a parallel resistance, self-regulating cable is provided in pre-terminated lengths with factory sealed connections. These cables are a top-of-the line solution for abating roof, gutter and downspout ice dams. The self-regulating heating cable automatically varies its heat output as the surrounding temperature changes. The PSR cables are suitable for shingle, slate, metal, wood and flat roofs with either plastic or metal gutters/downspouts. They are designed for commercial and residential roof and gutters prone to ice damming and dangerous icicles and downspouts that freeze and clog.