16"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 17.75"w x 9.75"h] Material_Aluminum accordion dd ul li {

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High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

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

The premium durable material guarantees that they will never rust or wear through

Design – Re-configurable/Interchangeable Sections – Easily convertible into 1-Way

16"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 17.75"w x 9.75"h] Material_Aluminum accordion dd ul li {+ Product Details Size 16"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 9. 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