36"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 15.75"h] Floor Grille actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 10 5/8" height

with actual outer dimensions of 20

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 16" OR 16" x 30" duct opening (measured at the opening)

+ Product Details Size - 10"w X 4"h is the size for the duct opening measurement only

36"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 15.75"h] Floor Grille actual front end outer dimensions+ Product Details Size 36"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 15. 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