20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 17.75"h] Filter Grille 1/4" - 6518 PSI

1/4" - 6518 PSI

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 6" duct openings

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 36" OR 36" x 26" duct opening (measured at the opening)

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20"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 17.75"h] Filter Grille 1/4" - 6518 PSI+ Product Details Size 20"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 17. 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