16"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 9.75"h] w36h36 Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 21 3/4" x 1"

+ Product Details Size – 22" x 36" or 36" x 22" is the size for the duct opening measurement only

and home improvement remodeling specialists complete their masterpiece

the actual front end outer dimensions are 7" in diameter

+ Product Details Size - 32"w X 20"h X 2"d (for duct opening measurement only)

16"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 9.75"h] w36h36 Actual Filter Size – 33+ Product Details Size 16"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 9. 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 wear