34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] Color_Black + Product Details Size -

+ Product Details Size - 25"w X 18"h is the size for the duct opening measurement only

and yet lightweight and easy to handle

this thermostat guard combines dependable security with a professional and attractive appearance

This versatile guard features air circulating ports on all four sides to allow proper airflow

It features an eight-tumbler lock with a supplied key for secure access

34"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 7.75"h] Color_Black + Product Details Size -+ Product Details Size 34"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 7. 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