Frame and Blades: Galvanneal steel.
Standard Finish: Powder coat gray.
Construction: Louvers with 2-1/4″ blade spacing are attached by interlocking construction to the 1 3/4” deep, welded frame. 2″ trim with mitered and welded corners.
Mounting: Screws fasten through frame into louver core, leaving exterior side of frame free of fasteners.