20"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 25.75"h] Insulated Line Set + Product Details Size –

+ Product Details Size – 18" x 26" or 26" x 18" is the size for the duct opening measurement only

Pack of 4 Pieces

Scratch-Resistant

+ Product Details Size – 32"w X 8"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 14 5/8" height

20"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 25.75"h] Insulated Line Set + Product Details Size –+ Product Details Size 20"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 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