20"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 33.75"h] Access Door +Product Details Size – 4"h

+Product Details Size – 4"h x 12"w is the size for the duct opening measurement only

Monitor the pump for any unusual noises or vibrations

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+ Product Details Size – 10"w X 3"h is the size for the duct opening measurement only

+ Product Details Size - 30"w X 36"h is the size for the duct opening measurement only

20"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 33.75"h] Access Door +Product Details Size – 4"h+ Product Details Size 20"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 33. 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