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.
Use to connect round pipe or insulated flexible duct to an air register or grill (pipe, duct, air register and grill not included)
Insulation lining helps absorb system noise and helps control condensation
Pre-wrapped and ready to install for easy installation
Seal seams with code-approved mastic, sealant or duct tape (mastic, sealant and duct tape not included)
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.