28"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 19.75"h] Fixed Blades with Damper Ideal for Walls & Ceilings: 4 X 12 Is CRFG2028 Width_14in

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 20" duct openings

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ensuring that you find the perfect fit for your ventilation needs

+ Product Details Size – 34"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 34"w X 8"h is the size for the duct opening measurement only

28"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 29.75"w x 19.75"h] Fixed Blades with Damper Ideal for Walls & Ceilings: 4 X 12 Is CRFG2028 Width_14in Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 20" duct openings const content = item