Master Flow 4 in. Starting Collar Take Off

The Master Flow 4 in. Starting Collar is suitable for most HVAC applications. It provides a transition from a flat surface like a plenum (made from metal, ductboard or insulated) to round pipe or insulated flexible duct. It can be used with ductboard, an internally lined or unlined plenum. This galvanized steel starting collar features extra-long tabs to fit most duct board thicknesses.

• Transition from flat surface to round pipe or insulated flex duct
• Durable galvanized steel construction
• Fits most ductboard thicknesses through 1-1/2 in. (or R6 value)