18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 23.75"h] Compatible with Duct 10" + Product Details Size –

+ Product Details Size – 16" x 24" or 24" x 16" is the size for the duct opening measurement only

+ Product Details Size – 16"w X 16"h is the size for the duct opening measurement only

no professional tools needed

Actual Filter Size – 29 3/4"w x 19 3/4" x 1"

our carefully crafted products offer superior performance

18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 23.75"h] Compatible with Duct 10" + Product Details Size –+ Product Details Size 18"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 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