Master Flow 12 in. x 12 in. to 8 in. Universal Register Box with Flange

The Master Flow 12 in. x 12 in. Universal Register Box with Flange is designed to be used with 8 in. ducts to create a straight transition from a round pipe or insulated flexible duct to an air register or grill. Made of zinc-coated, galvanized steel this register box is designed for durability. The built-in flange helps you install the box before dry walling.

• Creates a straight, in-line transition to a register grille
• Durable galvanized steel construction
• Used in ceiling applications (snap-on rails sold seperately)