HVAC Premium 20"W x 20"H Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"W 21.75"H]

20"w X 20"h Is The Size For The Duct Opening Measurement Only, Actual Front End Outer Dimensions Are 21.5" Width X 21.5" Height - SEE BELOW IN DESCRIPTION HOW TO MEASURE A GRILLE Weather and Pest Proof - These Louvers are especially designed to allow passage of air into your home while preventing water from entering, and with a built-in back 3/16" 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 through leaving the material with an elegant, beautiful, and smooth surface, adds a luxurious touch to any home. Louvers are built to withstand hurricanes, tornados and tropical storm conditions. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions..International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.