If you have an RV, you already know that some of the workmanship is questionable. I was repairing the furnace ductwork because the tape holding the 6-inch flex-duct flange to the upper bedroom plenum had fallen off. I repaired that by screwing the flange to the plenum then taping the edges. All better.The duct between the furnace and the bathroom vent was a 2-inch flex-duct. It, too, had fallen off because it was cut so short and pulled so tight that the feeble hose clamp did not hold on the bathroom side. I replaced that duct with this new purchase, made it long enough to be relaxed, and screwed the duct to its connectors on both ends with short sheet-metal screws holding the spiral wire in the duct. Then I put the hose clamps on for good measure.This flex-duct was easy to work with, rugged, and it did the job. All is working great on the furnace now.