16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 35.75"h] 10" Diameter + Product Details Size –

+ Product Details Size – 18" x 34" or 34" x 18" is the size for the duct opening measurement only

Ring Base Design – Allows for easy installation without removing the thermostat

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 6" or 6" x 8" duct opening (measured at the opening)

Assembeled Before Powder Coat Paint

16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 35.75"h] 10" Diameter + Product Details Size –+ Product Details Size 16"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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