Master Flow 12 in. x 12 in. to 8 in. Ceiling Register Box

The Master Flow 12 in. x 12 in. x 8 in. Ceiling Register Box is made of 30-Gauge, galvanized steel. It creates a transition from round pipe or insulated flexible duct to an air register or grille. The ceiling register box can be installed with sheet metal screws. It has a maximum temperature rating of 390 degree F.