34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] Color_R-4.2 Yellow actual front end outer dimensions

actual front end outer dimensions are approximately 36 5/8" width X 38 5/8" height

actual front end outer dimensions are approximately 37

please note that the total outer dimensions of the grille measure 8" in diameter

actual front end outer dimensions are approximately 18 5/8" width X 10 5/8" height

75"H – fits a 20" X 20" duct opening

34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] Color_R-4.2 Yellow actual front end outer dimensions+ Product Details Size 34"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 7. 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