18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 15.75"h] d but still very thin

but still very thin

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 36" or 36" x 8" duct opening (measured at the opening)

+ Product Details Size – 22" x 30" or 30" x 22" is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 33 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 4" duct openings

18"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 15.75"h] d but still very thin+ Product Details Size 18"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 15. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never