8"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 25.75"h] 12" Round Duct Pipe which the interior PET provides

which the interior PET provides

With our extensive selection of Grilles

+ Product Details Outer dimensions: – fits a duct opening

positioning supply and return grills accordingly

Actual Filter Size – 23 3/4"w x 17 3/4" x 1"

8"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 25.75"h] 12" Round Duct Pipe which the interior PET provides+ Product Details Size 8"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 25. 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