10"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 17.75"h] Aluminum - Cube Core + Product Details Size -

+ Product Details Size - 6"w X 14"h is the size for the duct opening measurement only

high-impact plastic

875" width X 11

each diffuser is carefully shrink-wrapped with a sturdy cardboard backing

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 36" OR 36" x 28" duct opening (measured at the opening)

10"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 17.75"h] Aluminum - Cube Core + Product Details Size -+ Product Details Size 10"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 17. 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