36"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 29.75"h] w8h8 + Product Details Size -

+ Product Details Size - 30"w X 6"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 29 3/4" x 1"

with actual outer dimensions of 36

+ Product Details Size – 24" x 24" with 12" collar T-Bar drop ceiling perforated return grill - metal back casing

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

36"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 29.75"h] w8h8 + Product Details Size -+ Product Details Size 36"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 29. 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