Product review (1 stars): Don't waste your time, unless you really, really enjoy wasting time
I'd like to start this review by summarizing that everything about this dryer vent duct is awful.  If you decide to purchase this thing, approach the process as if you're digging a few unrelated pieces of scrap metal parts out of a dumpster, and cobbling them together such that they'll work for your application.  I'm the type that would normally do this sort of thing anyway, so I thought this would be no big deal.  I was incorrect.

As other reviewers have stated, there are enormous gaps in between the different sheet metal parts, easily 3/8 of an inch in some places.  When I bought this though, I was aware of that, and prepared to spend an hour plus doctoring it up with metal high-temp ducting tape if it meant I could get my dryer closer to the wall and close the closet door in front of it.  After spending an hour and a half carefully taping up all of the enormous gaps, making sure to cross-tape and stagger layers so the tape would be structurally sound -- because this flimsy rag-tag pile of parts meant that was necessary -- I was ready to start hooking this thing up.

Or was I?  The 'right-angle' collar that sticks up from the flat portion of the duct is barely wide enough to use a worm clamp on.  Assuming that your dryer's duct sticks straight out of the back of the dryer, with no protruding paneling around it, you might be okay.  My GE Profile dryer was not so simple, so I cut a six-inch length of flexible metal dryer ducting to connect to the dryer, and to the collar on the duct.  The short collar on this thing made that an almost impossible exercise, as there was barely enough collar for the worm clamp to hold the flex duct onto, and the metal is so soft that tightening the clamp too much just caused the metal collar to collapse.  So, more tape, more clamp finagling, and more choice words, had this tentatively taken care of.

This brings me to the other side of the duct, the flat-to-round part with the accordion crimping that is supposed to make it easier to clamp some flex duct onto this thing that will then connect to the vent going outside.  The accordion-crimped part tapers down towards the edge, which makes your duct just want to slip off, even when clamped on.  Never mind the fact that the accordion crimping makes that portion of the duct too small to mate up well with the flex duct, so you end up crushing your flex duct and creating gaps or splits in the duct allowing dryer exhaust to leak out.  I have a gas dryer, so this really wasn't an option.  After spending the better part of 3 hours messing with this pile of junk, I threw it in the recycle bin and put the original length of metal flex duct back on the dryer.