3-1/4 in. x 10 in. Rectangular Stack Duct Starting Collar

3-1/4 in. x 10 in. Rectangular Stack Duct Starting Collar

• Installs with sheet-metal screws
• Galvanized-steel construction
• Use to transition from ductboard plenums, lined plenums, or flat surfaces to 3-1/4 in. x 10 in. stack duct
• Seal seams with code-approved mastic, sealant or duct tape (not included)
• Insulate ductwork for system efficiency and comfort

Rectangular Stack Duct Starting Collar is made of durable, galvanized steel. It is used to transition from plenums (duct board or lined) or a flat surface to 3.25 in. x 10 in. stack duct. It installs easily with sheet-metal screws.