8"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 9.75"w x 17.75"h] Brown + Product Description Secure your

+ Product Description Secure your thermostat with the heavy-duty Beige Metal Thermostat Guard

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

The included eight-tumbler lock and supplied key provide secure access

75"H – fits a 20" X 10" duct opening

8"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 9.75"w x 17.75"h] Brown + Product Description Secure your+ Product Details Size 8"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 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 wear