DAYTON 5NKL3 Door Louver,18-1/4 H,18-1/8 W,Aluminum

"Door Louver, Intake or Exhaust, Louver Overall Height 18 1/8 in, Louver Overall Width 18 1/4 in, Flange Width (In.) 1 3/16 in, Louver Cutout Height 16 1/2 in, Louver Cutout Width 16 1/2 in, Louver Door Thickness 1-3/8 in to 2-1/4 in, Louver Free Area 1.02 sq ft, Extruded Aluminum Louver Material, Number of Blades 24, Clear Anodized Finish, Blade Angle (Deg.) 45, For Use With New or Existing Doors, Includes FastenersFeaturesNumber of Blades: 24Louver Item: Door LouverLouver Overall Width: 18 1/4 inItem: Door LouverFlange Width (In.): 1 3/16 inLouver Cutout Height: 16 1/2 inLouver Cutout Width: 16 1/2 inLouver Overall Height: 18 1/8 inFinish: Clear AnodizedBlade Angle (Deg.): 45Includes: FastenersLouver Free Area: 1.02 sq ftFor Use With: New or Existing DoorsLouver Door Thickness: 1-3/8 in to 2-1/4 inType: Intake or ExhaustLouver Material: Extruded Aluminum"