The Bridgeport RFN-300 3" Neoprene Service Entrance Roof Flashing prevents water from seeping through the roof of a structure where a conduit mast comes out of the roof surface. Operators can properly seal copper, cast iron, galvanized, or plastic pipe. This flashing can be used on flats to 45 degree angle roofs. This flashing is not recommended for hot-mopped or built-up roofs. Our service entrance roof flashings are engineered with the quality and innovation that allows contractors to save time and money on every job. When you need quality electrical fittings for more efficient jobs, look for Bridgeport Orange.