20"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 37.75"h] Compatible with Duct 8" Design – Fixed hinged for

Design – Fixed hinged for easy filter change & cleaning - uses a 1" thick filter

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

Assembeled Before Powder Coat Paint

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+ Product Details Size – 36"w X 16"h is the size for the duct opening measurement only

20"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 37.75"h] Compatible with Duct 8" Design – Fixed hinged for+ Product Details Size 20"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 37. 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