24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] Color_Aluminum Superior Airflow Control: Built-in damper

Superior Airflow Control: Built-in damper lets you control how much air enters your room

Durable stamped steel construction ensures long-lasting performance

actual front end outer dimensions are approximately 16 5/8" width X 8 5/8" height

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] Color_Aluminum Superior Airflow Control: Built-in damper+ Product Details Size 24"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 21. 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