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

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

Register Box with Flange is designed for 12 in. round ducts. This 28 gauge register box with flange is made of zinc-coated galvanized steel. The maximum temperature rating is up to 390 degrees Fahrenheit and the minimum temperature rating is as low as -100 degrees Fahrenheit.