22"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 31.75"h] w22h22 + Product Details Size –

+ Product Details Size – 18" x 32" or 32" x 18" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening)

Rigid gauge built for durability and long life in mind

+ Product Details Size - 12"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 24 5/8" height

22"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 31.75"h] w22h22 + Product Details Size –+ Product Details Size 22"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 31. 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