Master Flow 10 in. x 4 in. - 8 in. Universal Register Box

The Master Flow 10 in. x 4 in. x 8 in. universal register box is used to create a straight (in-line) transition from round pipe or insulated flexible duct to an air register or grille. It is made of 30-Gauge, galvanized steel to provide strength and durability. This universal register box can be installed with sheet-metal screws.