34"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 35.75"h] 10" Diameter + Product Details Size –

+ Product Details Size – 6" x 12" or 12" x 6" is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard duct openings

Actual Front End Outer Dimensions Are 31

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+ Product Description Enhance your HVAC system with our premium Aluminum Double Deflection Adjustable Air Supply Diffuser

34"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 35.75"h] 10" Diameter + Product Details Size –+ Product Details Size 34"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 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