This Master Flow ceiling register box is constructed from 30-gauge galvanized steel and is designed for HVAC transitions. It facilitates the connection between an 8-inch round pipe or insulated flexible duct and a 12-inch by 12-inch air register or grille. Suitable for ceiling applications, this durable box can be installed using sheet metal screws and features a maximum temperature rating of 390 degrees Fahrenheit. It is ideal for residential or commercial heating and cooling systems to ensure efficient airflow

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