32"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 19.75"h] 6in diameter + Product Details Size –

+ Product Details Size – 32"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 5 3/4" x 1"

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Design – These Supply Diffusers with integral round necks are recommended for heating

actual front end outer dimensions are approximately 24 5/8" width X 24 5/8" height

32"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 19.75"h] 6in diameter + Product Details Size –+ Product Details Size 32"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 19. 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