6"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 21.75"h] Insulated Line Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 21 3/4" x 1"

12"w X 3"h Is The Size For The Duct Opening Measurement Only

All year round solution - Get the hot air out during the Summer Months

actual front end outer dimensions are approximately 27 5/8" width X 38 5/8" height

actual front end outer dimensions are approximately 28 5/8" width X 10 5/8" height

6"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 21.75"h] Insulated Line Actual Filter Size – 27+ Product Details Size 6"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 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 wear