This Master Flow 10 in. x 3-1/4 in. to 5 in. Stack Boot provides a straight-line transition from specially-sized round pipe or insulated flexible duct to a rectangular stack duct. The stack boot is made of galvanized steel and installs with sheet-metal screws. Seal seams with code-approved mastic， sealant or duct tape (not included).
Galvanized-steel construction
Creates a straight-line transition from a 5 in. round pipe or insulated flexible duct to a 10 in. x 3-1/4 in. rectangular stack duct
Installs with sheet-metal screws
Insulate ductwork for system efficiency and comfort
Seal seams with code-approved mastic， sealant or duct tape (not included)
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