Preweathered Zinc Outlets are the gutter fittings used to transition the flow of water from the gutter to the downspout. Our zinc outlet tubes are available for 3" and 4" round zinc downspouts. The B Outlet gets installed on the inside of the gutter and is shaped the same as the half round gutter for a clean and simple installation. The Decorative Outlet gets installed on the outside of the gutter and allows for a larger flow of water.