Master Flow 10 in. x 6 in. to 6 in. Universal Register Box with Flange
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The Master Flow 10 in. x 6 in. x 6 in. Universal Register Box with Flange is made of 30-Gauge, 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 provides space for easy joist attachment for a more secure installation.