White Vari Pitch Adjustable Louver, 41-5/8 To 34, 21-1/4' Frame Length, Adjusts From 2.5/12 To 9/12 Roof Pitch, Aluminum Construction, 8" x 8" Perma Coated Screen, 1-1/2" Wide Mounting Flange, Pivoting Blades Provide Maximum Weather Protection, Fast & Easy Installation.
