The Master Flow 12 in. Starting Collar can be used to transition from a flat surface such as a lined or duct board plenum to round pipe or insulated flexible ducts. Can also be attached to metal surfaces. Made of galvanized steel, this starting collar is made for durability. The 2 in. space between the bead and flange provides you with plenty of space for securing an insulated flexible duct.
Made of galvanized steel
Helps transition from lined or duct board plenums to round pipes or insulated, flexible ducts
Can be used with an internally lined or unlined plenum or duct
Seal seams with code-approved mastic, sealant or duct tape (sold separately)
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.