20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 21.75"h] 6in diameter actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 26 5/8" height -

actual front end outer dimensions are approximately 18 5/8" width X 26 5/8" height -

+ Product Details Size - 34"w X 20"h is the size for the duct opening measurement only

Elevate comfort while saving on bills with HVAC Premium's Aluminum Adjustable Return Grill

actual front end outer dimensions are approximately 12 5/8" width X 32 5/8" height -

20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 21.75"h] 6in diameter actual front end outer dimensions+ Product Details Size 20"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 23. 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