34"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 27.75"h] w16h16 + Product Details Size –

+ Product Details Size – 34"w X 6"h is the size for the duct opening measurement only

the gap will expand and retract to meet perfect air supply needed

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with our 6" Round Air Vent Supply Grille

+ Product Details Size - 18"w X 20"h X 2"d (for duct opening measurement only)

34"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 27.75"h] w16h16 + Product Details Size –+ Product Details Size 34"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 27. 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