26"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 35.75"h] Grille + Product Details Size –

+ Product Details Size – 28"w X 6"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 8"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening)

85" width X 15

+ Product Details Size - 18"w X 4"h is the size for the duct opening measurement only

26"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 35.75"h] Grille + Product Details Size –+ Product Details Size 26"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 35. 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