The Master Flow 12 in. x 6 in. x 6 in. Universal Register Box with Flange is made of galvanized steel. It creates a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grille. The built-in flange helps to create a more secure installation by providing an area for register screws, Sheetrock frame or nails for joists. The flange creates the ability to install the box before dry walling.
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- Creates a straight (in-line) transition from 6 in. round pipe or insulated flexible duct to a 12 in. x 6 in. air register or grille
- Built-in flange helps to create a more secure installation by providing an area for register screws, sheetrock frame or nails for joists
- Flange creates the ability to install the box before dry walling
- Maximum temperature rating of 390 degree F, minimum temperature rating of 100 degree F



















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