6"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 11.75"h] 2-Way + Product Details Size –

+ Product Details Size – 16"w X 32"h is the size for the duct opening measurement only

+ Product Details Size – 26"w X 22"h is the size for the duct opening measurement only

Whether you're restoring an old Victorian or craftsman style home

+ Product Description Enhance your HVAC system with our Aluminum Return Filter Linear Bar Grille

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 20" OR 20" x 24" duct opening (measured at the opening)

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