30"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 19.75"h] 12" Diameter The design eliminates noise and

The design eliminates noise and prevents louvers from vibrating

Actual Filter Size – 31 3/4"w x 19 3/4" x 1"

+ Product Details Size - 24"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 24 5/8" height

30"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 19.75"h] 12" Diameter The design eliminates noise and+ Product Details Size 30"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 19. 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