Product review (1 stars): Bad News.  Way too fragile and flimsy!
So fragile its impossible to get it on a connector without crumpling so bad it would be a lint trap.  Bought this one and an 8  footer.  This two
footer crumpled beyond being usable.  Stretching out the 8 footer proved impossible due to ends collapsing under even slight pressure.
Out of necessity, settled on a remnant of the 8 footer to connect 4 feet.  If the provided clamps were any smaller, they would not fit.  Another
struggle getting them to close over the vent hose!

I'm an experienced home builder and struggled to make this work.  If you buy, I'd suggest you cut the crimped ends of connectors to give
yourself a chance at successful connection.