12"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 11.75"h] Return + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 34" OR 34" x 36" duct opening (measured at the opening)

+ Product Details Size – 30"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 26"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 29 3/4" x 1"

12"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 11.75"h] Return + Product Details Perfect Fit+ Product Details Size 12"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 11. 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