Master Flow 14 in. x 6 in. to 7 in. Universal Register Box with Flange

Master Flow 14 in. x 6 in. to 7 in. Universal Register Box with Flange

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.