26"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 9.75"h] Return actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 8 5/8" height

Actual Filter Size – 23 3/4"w x 11 3/4" x 1"

+ Product Details Size - 20"w X 14"h X 2"d (for duct opening measurement only)

+ Product Details Size - 24"w X 24"h X 2"d (for duct opening measurement only)

please note that the total outer dimensions of the grille measure 14" in diameter

26"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 9.75"h] Return actual front end outer dimensions+ Product Details Size 26"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 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