20"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 29.75"h] Color_R-8.0 Pink actual front end outer dimensions

actual front end outer dimensions are approximately 21 5/8" width X 31 5/8" height

+ How To Measure A Grille

75" width X 33

please note that the total outer dimensions of the grille measure 12" in diameter

+ Product Details Size - 34"w X 26"h is the size for the duct opening measurement only

20"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 29.75"h] Color_R-8.0 Pink actual front end outer dimensions+ Product Details Size 20"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 29. 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