Master Flow 12 in. x 8 in. Duct Board Insulated Register Box

This Master Flow 12 in. x 8 in. Duct Board Insulated Register Box - R6 is pre-wrapped with R6 fiberglass insulation to help provide high thermal efficiency. Use this register box to transition from round pipe or insulated flexible duct to a grill or air register (pipe, duct, grill and air register not included). This versatile box is compatible with multiple collar sizes for your convenience.

• Transition from pipe or insulated flex duct to register grille
• Durable galvanized steel construction
• R6 ductboard insulation, no need to wrap