8"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 29.75"h] w28h28 + Product Details Size -

+ Product Details Size - 4"w X 32"h is the size for the duct opening measurement only

Upgrade to a new standard of air quality and aesthetics with our Aluminum Ceiling Diffuser

actual front end outer dimensions are approximately 34 5/8" width X 18 5/8" height

Design – Full Control Vertical/Horizontal Air flow Direction

8"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 29.75"h] w28h28 + Product Details Size -+ Product Details Size 8"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 29. 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