Air Louvers 1900A 24x18-B Door Louver Fire-Rated Adjustable with Fusible Link Mineral Bronze Finish

Air Louvers 1900A 24x18-B Door Louver Fire-Rated Adjustable with Fusible Link Mineral Bronze Finish, The 1900A-24x18-B  Fire Rated Steel Door Louver Adjustable Z-Blade Louver with Fusible Link activated at 165 Degrees F is Ideal for Use in Steel and Composite Fire Doors up to 1-1/2 Hour Rating.

The 1900A-24x18-B-Mineral Bronze-Fire Rated Steel Door LouverAdjustable Z-Blade Louver with Fusible Link activated at 165 Degrees F is Ideal for Use in Steel and Composite Fire Doors up to 1-1/2 Hour Rating. The Self-Attaching Frame Style is Ideal for Installation in Existing Door Cutouts.