This Master Flow 10 in. x 10 in. Duct Board Insulated Register Box (Model DIRB10X10) is designed to provide a high-efficiency transition from round HVAC pipe or insulated flexible ducting to an air register or grille. Constructed from durable galvanized steel and pre-wrapped with R6 fiberglass insulation, it helps maintain thermal efficiency, minimize condensation, and reduce system noise. Suitable for various plumbing and HVAC applications, this versatile register box is ready for immediate installation without the need for additional wrapping

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