Product review (5 stars): Good Dryer Foil Tube
It is what it is__a foil dryer vent tube. After doing a dryer repair job, I bought it to replace the one I had for years and years. It does its job well, although the 8 foot one was just barely long enough. I hate the clamps that came with it, but that is just me--I  never learned how to use them quickly and efficiently, but I managed to get 'em on securely. Next time I will use hose clamps as others suggested.