20"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 35.75"h] 14" Round Duct Pipe cursor: pointer

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+ Product Details Size - 10"w X 8"h X 2"d (for duct opening measurement only)

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

Actual Filter Size – 33 3/4"w x 27 3/4" x 1"

+ Product Details Size – 15" Wooden Corner Baseboard Grille

20"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 35.75"h] 14" Round Duct Pipe cursor: pointer+ Product Details Size 20"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 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