36"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 9.75"h] Material_Steel Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 17 3/4" x 1"

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

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening)

Easy Installation – Includes all necessary screws for quick and hassle-free setup

36"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 9.75"h] Material_Steel Actual Filter Size – 25+ Product Details Size 36"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 9. 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