18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 19.75"w x 25.75"h] Round Damper Ring damper-link { color: #5296DD

damper-link { color: #5296DD

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

+ Product Details Size - 34"w X 26"h is the size for the duct opening measurement only

Outer Dimensions Are 17

18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 19.75"w x 25.75"h] Round Damper Ring damper-link { color: #5296DD+ Product Details Size 18"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 25. 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