Master Flow Master Flow Central Air & Heat Components 6 in. x 6 in. Ductboard Insulated Register Box - R6 DIRB6X6
The Master Flow 6 in. x 6 in. Duct Board Insulated Register Box - R6 is pre-insulated and ready to use for easy installation. This box features R6 fiberglass insulation that will help provide high thermal efficiency, control condensation and absorb system noise. This box can be used with multiple collar sizes for your convenience.