16"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 27.75"h] Return Grille + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 6" or 6" x 12" duct opening (measured at the opening)

+ Product Details Size – 12" x 32" or 32" x 12" is the size for the duct opening measurement only

Each grille is securely shrink-wrapped with a cardboard backing to prevent damage during shipment

Actual Filter Size – 33 3/4"w x 31 3/4" x 1"

Quality Packaging – Carefully shrink wrapped with cardboard backing to prevent damage in shipment

16"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 27.75"h] Return Grille + Product Details Perfect Fit+ Product Details Size 16"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 27. 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