10"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 7.75"h] Grille + Product Details Size -

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

+ Product Details Size – 22"w X 28"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 25 3/4"w x 5 3/4" x 1"

actual front end outer dimensions are approximately 36 5/8" width X 12 5/8" height

10"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 7.75"h] Grille + Product Details Size -+ Product Details Size 10"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 7. 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