Louver Stationary Drainable
Featuring a front flange extruded aluminum frame 4 inches deep with non-adjustable blades positioned precisely on 5 inch centers. A removable frame with 5/8" x 0.40 inch aluminum birdscreen included. This baby comes in Mill Finish and can take a max airflow of 748 FPM and wind load of 02 pounds per square foot. Wowza!