Frame and Blades: Cold rolled steel or zinc-plated steel.
Standard Finish: Bronze powder coat.
Construction: Louvers are riveted to operating bar and frame at 1″ intervals. 1-1/4″ face frame has mitered and welded corners.
Mounting for 1-3/4″ Doors: Screws fasten through louver core.
Listings and Ratings: UL and Intertek Classification. Tested and listed to UL10C in fire doors up to to 1-1/2 hour rating.