34"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 37.75"h] with filter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 6" OR 6" x 26" duct opening (measured at the opening)

+ Product Details Size - 34"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height -

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

34"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 37.75"h] with filter + Product Details Perfect Fit+ Product Details Size 34"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 37. 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