8"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 15.75"h] sidewall + Product Details Outer dimensions:

+ Product Details Outer dimensions: – fits a duct opening

+ Product Details Size - 12"w X 24"h X 2"d (for duct opening measurement only)

+ Product Details Heavy-Duty Steel Construction - Made from 20-gauge steel for superior durability and reliable performance

+ Product Details Size - 12"w X 14"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 6" OR 6" x 36" duct opening (measured at the opening)

8"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 15.75"h] sidewall + Product Details Outer dimensions:+ Product Details Size 8"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 15. 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