Door Louver14-1/8 H20-1/4 WSteel Door Louver Material Steel Finish Gray Primer Louver Opening Height 12 1/2 in Louver Opening Width 18 1/2 in Rough Opening... Door Louver Material Steel Finish Gray Primer Louver Opening Height 12 1/2 in Louver Opening Width 18 1/2 in Rough Opening Height 12 1/2 in Outside Height 14 1/8 in Outside Width 22 1/4 in Free Area 0.8 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 18 1/2 in Blade Angle 45 Degrees Adjustable Blades No Intake or Exhaust Application Exhaust Intake Includes Fasteners Number of Blades 22 High Quality Louver Window Aluminum Bi-folding Interior Louver Shutters Louvers For Door Dayton Door Louver,14-1-8 H,20-1-4 W,Steel 6WRJ4 Dayton Fans Commercial Waterproof & windproof full cover for Polaris Slingshot. Heavy-duty design with soft inner layer. Fits multiple models. Includes 4 straps