8"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 27.75"h] w14h14 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 33 3/4" x 1"

+ Product Details Size – 10"w X 32"h is the size for the duct opening measurement only

ensuring they don't overlap

5/8" - 2579 PSI

only measure the "hole" in the wall/duct

8"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 27.75"h] w14h14 Actual Filter Size – 23+ Product Details Size 8"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 27. 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