10"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 7.75"h] Supply Grille + Product Details Size –

+ Product Details Size – 26"w X 28"h is the size for the duct opening measurement only

75"H – fits a 6" X 4" duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 28" OR 28" X 16" duct opening (measured at the opening)

Tool-Free Access for Easy Filter Changes - Features a user-friendly plastic latch that opens effortlessly without a screwdriver

Airflow Control – Adjustable airflow lever allows precise control over the direction and volume of air

10"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 7.75"h] Supply Grille + Product Details Size –+ Product Details Size 10"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 7. 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