26"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 17.75"h] Compatible With Duct 12in The crank handle lever makes

The crank handle lever makes it easy to adjust to every weather situation

Rigid gauge built for durability and long life in mind

High Quality – Heavy-gauge all-steel construction

For example

+ Product Details Size - 18"w X 16"h X 2"d (for duct opening measurement only)

26"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 17.75"h] Compatible With Duct 12in The crank handle lever makes+ Product Details Size 26"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 17. 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