Fits 12x4 Duct Opening Steel Adjustable Air Supply Grille by Handua | Register Vent Cover Grill for Sidewall and Ceiling | Black | Outer Dimensions: 13.75" X 5.75"

Additional Details from the Manufacturer

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• HOW TO MEASURE - Always measure the duct opening to determine which size you should order. Duct Opening Size = Listed Size. If the hole on the wall or ceiling is 12" W x 4" H please order the 12x4 size option. The outer dimensions of the grille are 1.75" wider.
• CUSTOMIZABLE AIRFLOW - Our adjustable air supply grille features a unique design that allows you to customize the airflow in your space. Whether you need a gentle breeze or a powerful gust, this vent cover lets you control the airflow to suit your comfort level with back dampers. With vertically adjustable blades that can be deflected individually, you have the flexibility to adjust the airflow to the right and left, making it a versatile wall air vent cover.
• HIGH-QUALITY MATERIALS - Made of high quality steel with durable powder paint coated, the adjustable ceiling register is built to last and withstand daily use. The steel is stamped so there is no sharp edges. It is noise free product.
• VERSATILE APPLICATION - Handua adjustable register vent cover used for sidewall or ceiling openings. Using our adjustable HVAC vent cover within your ventilation system will improve your home circulation.
• EASY INSTALLATION - Installing this metal adjustable register grilles is a breeze, with simple, hassle-free mounting options and included screws. Enjoy a quick and straightforward setup to enhance your home's ventilation.