Product review (1 stars): Ehhh....came bent, and the collars aren't the right size
I decided, to make more space in my small laundry room, to stack my two front-loaders.  I wanted a clean, professional look for the duct, but it had to be something that could reach at least 30".  I went back and forth between this item and&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Dundas-Jafine-UD48-Space-Saver-Aluminum-Dryer-Duct-Extends-28-Inch-to-45-Inch/dp/B00009V3TL/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Dundas Jafine UD48 Space Saver Aluminum Dryer Duct, Extends 28-Inch to 45-Inch</a>.  I wish I'd bought that one instead.

Firstly, though the box was not damaged, there was a big dent in one half of housing...so someone packed it for shipping knowing it was damaged.

Secondly, the collars are neither tapered or sized to overlap the collar to which you're connecting them, so you're not going to be able to slip them into or over either your standard outlet collar OR a standard expandable duct--unless you plan to use a roll of foil tape to butt the two together and hope for the best.  Also, because they are hard collars, you can't use a screw clamp to secure them, even if they DID fit.  I ended up cutting one of the collars off completely and used some high-temp hot glue to attach it to&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Dryer-Dock-Vent-Hose-Quick-Connect/dp/B0028BAAWW/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Dryer Dock Vent Hose Quick Connect</a>, and the other I did the tape thing...for now.

Also, even though the picture looks like the duct is slim and sturdy, it's not.  Imagine taking a regular thin-tin duct and smooshing it a bit to make it more oval.  That's what this is like--and it dents and becomes misshapen very easily.

I'm going to order the other item now--do yourself a favor and avoid this one.