Available for sale...
A single aluminum semi-rigid duct, 4 inches in diameter and expandable up to 8ft.
From Deflecto, not flimsy like some expandable duct. Has the ends which insert nicely into the attachments (vs.using plastic or metal clamps to secure the duct).
New, very clean, no damage. I have several to sell.
Purchase one for $10, two for $18, three for $25, four for $30 or five for $35.
Thanks for looking.