24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 37.75"h] Black Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 5 3/4" x 1"

actual front end outer dimensions are approximately 36 5/8" width X 14 5/8" height

actual front end outer dimensions are approximately 36 5/8" width X 36 5/8" height

8-1/8"H x 4-5/8" W x 3-5/8"D

this easy-to-install grille fits seamlessly into any standard return filter opening

24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 37.75"h] Black Actual Filter Size – 21+ Product Details Size 24"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 37. 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