30° Thinline Outdoor Louver Gable Vent (Channel Frame) - Customizable 170BL 25X16 - See our listing for

- See our listing for 36mm replacement blades

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 36" OR 36" x 34" duct opening (measured at the opening)

+ Product Details 22" x 22" x 1" replacement air filters for your furnace

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+ Product Details Size – 22"w X 24"h is the size for the duct opening measurement only

30° Thinline Outdoor Louver Gable Vent (Channel Frame) - Customizable 170BL 25X16 - See our listing forOur 30 Thinline Aluminum Louver Vent Exterior Air Grille for Walls, Gables & Crawlspaces is Weather Resistant with a Channel Frame. Features Fixed 30 horizontal blades on 3 4" spacing. Fully extruded aluminum blades and channel frame. Supports are hidden behind blades for a clean appearance. Bird screen is standard or optional insect screen. Available in 1" standard dimension increments. Custom sizes manufactured up to 1 16" increments. Mounting