36"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 19.75"h] 14in diameter box-shadow: 0 2px 4px rgba(0

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Designed with two mounting base options—solid and ring—it offers flexible installation

actual front end outer dimensions are approximately 16 5/8" width X 8 5/8" height

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36"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 19.75"h] 14in diameter box-shadow: 0 2px 4px rgba(0+ Product Details Size 36"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 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