Standard Mount Universal Vent Assembly. Features: Self centering metal base w/radius corners. Interior garnish with wider 1-1/4 Inch flange and radius corner. Designed to withstand excessive wind and weather. Hinge: crimp sheet metal. Advantages: Universal, fits all rough openings. Flange covers all screws holes. One piece metal frame, deep drawn metal base. Covers all interior stains left by previous garnishes. Positive-seal weather stripping is leak resistant and water tight. Interchangeable with existing Elixir and Ventline products. Galvanized base, non-powered White vent (screen frame is Pure White).