I use this in place of an old vinyl plastic expandable tube. This works much better, as it has an opening with a rope to tie the opening around pipe, or in my case a ventilator fan that is 8" in diameter. I use this to vent welding fumes out of my garage. Its durable, and has D rings attached if you want to mount or hang it. Its easy to collapse when not in use. For the price, its durability in comparison to other options I looked for, it works great and has good value.