Dayton Door Louver,22-1/4 H,22-1/8 W,Aluminum 5NKL9

Door Louver, Material Aluminum, Finish Clear Anodized, Louver Opening Height 20 1/2 in, Louver Opening Width 20 1/2 in, Rough Opening Height 20 1/2 in, Outside Height 22 1/8 in, Outside Width 22 1/4 in, Free Area 1.6 sq ft, Flange Width 1 1/4 in, Maximum Door Thickness 2 1/4 in, Minimum Door Thickness 1 3/8 in, Rough Opening Width 20 1/2 in, Blade Angle 45 Degrees , Adjustable Blades No, Intake or Exhaust Application Exhaust, Intake, Includes Fasteners, Number of Blades 30