This Master Flow 10 in. x 8 in. Duct Board Insulated Register Box - R6 features R6 fiberglass insulation to help provide high thermal efficiency， control condensation and absorb system noise. The box is ideal for helping you connect round pipe or insulated flexible duct to an air register or grill (pipe， duct， air register and grill not included). It is pre-wrapped and ready to install for easy installation.

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

R6 fiberglass insulation helps provide high thermal efficiency

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)

Versatile box works with multiple collar sizes (not included)