32"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 19.75"h] Grille 75"H – fits a 18"

75"H – fits a 18" X 4" duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 22" or 22" x 8" duct opening (measured at the opening)

For 6" Round Duct Opening - Spiral or Flex

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

32"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 19.75"h] Grille 75"H – fits a 18"+ Product Details Size 32"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 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