Master Flow Universal Register Boxes create a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grill. A built-in flange provides space for easy joist attachment， creating a more secure installation.
Galvanized steel construction
Always seal seams with building code approved sealant or duct tape
Built-in flange provides area for register screws， sheet rock frame， or nailing area for joists
Flange creates ability to install box before dry walling
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