LayFlat DuctingIts as easy as cut-and-tape!Strong, 4-mil poly ducting for nearly any application. Send air around the room, out the window, into the attic! Keep at least one roll of versatile LayFlat ducting in every truck! Speed the drying process by attaching disposable LayFlat ducting to the built-in outlet duct of our dehumidifiers, then direct dry air where you need it-into another room, ceilings or attics, and cabinets or built-ins, or into a Dri-Eaz TurboDryer airmover. 500 feet per roll. 13" wide, expands to 8.3" diameter.