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] 12" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 16 5/8" height

+ Product Details Size - 28"w X 6"h is the size for the duct opening measurement only

Example: If your opening is 14" tall by 20" wide

+ Product Details Size – 28" x 34" or 34" x 28" is the size for the duct opening measurement only

+ Product Details Size – 14" x 26" or 26" x 14" 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] 12" Round Duct Pipe 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