I bought this to replace a collapsed crossover duct underneath a double wide. The connection ends were cut very evenly such that I didn't have to trim them at all. I could have shortened the duct by about 4 ft for my application but didn't bother since...

Great product difference is amazing instructions on box really made a difference

Silver outer layer. Comes in a box, not a bag. Be careful when calculating how much flex duct you need. Turns use up more than one would think. The larger the diameter the duct, the more you lose on a turn

Exactly as described, priced very reasonable. I'm glad I bought this flex duct online and installed it myself to replace a failed (collapsed) duct in my attic. Saved much $$ to have it installed by a HVAC company.