16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 35.75"h] 10" Diameter Design – Premium plated finish

Design – Premium plated finish and modern contemporary design forming a luxurious piece

Actual Filter Size – 11 3/4"w x 31 3/4" x 1"

+ Product Details Size – 8" x 18" or 18" x 8" is the size for the duct opening measurement only

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

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

16"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 35.75"h] 10" Diameter Design – Premium plated finish+ Product Details Size 16"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 35. 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