22"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 23.75"h] w12h12 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 26" Or 26" x 34" duct opening (measured at the opening)

12" Diameter Is The Size For The Duct Opening Measurement Only

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

actual front end outer dimensions are approximately 16 5/8" width X 12 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 36" OR 36" X 14" duct opening (measured at the opening)

22"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 23.75"h] w12h12 + Product Details Perfect Fit+ Product Details Size 22"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 23. 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