16"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 33.75"h] 6in diameter Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 6" duct openings

actual front end outer dimensions are approximately 30 5/8" width X 18 5/8" height

making it a reliable choice for improving indoor air quality

Actual Filter Size – 33 3/4"w x 21 3/4" x 1"

with actual outer dimensions of 18

16"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 33.75"h] 6in diameter Ideal for Walls & Ceilings:+ Product Details Size 16"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 33. 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