22"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 7.75"h] Color_Anodized Aluminum } /* Added styles for

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The total outer size of this grille is the listed size plus plus 2 and 5/8"

+ Product Details Size – 10"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 20"h X 2"d (for duct opening measurement only)

75"H – fits a 18" X 10" duct opening

22"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 7.75"h] Color_Anodized Aluminum } /* Added styles for+ Product Details Size 22"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 7. 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 wear