36"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 11.75"h] 14" Round Duct Pipe + Product Details Size –

+ Product Details Size – 28"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height -

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

+ Product Details Outer dimensions: 19

actual front end outer dimensions are 23

36"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 11.75"h] 14" Round Duct Pipe + Product Details Size –+ Product Details Size 36"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 11. 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