Product review (4 stars): Quick, Easy and Nice!
This vent helped me with a space issue and is much better than having round vinyl type vent hose bunched up behind the dryer.  My vent also works better and therefore, my dryer should function better also.

Just so you understand how it works:  the two vent 'holes' slide together to reach the desired length and then you cut off the excess tin that you don't need.  You may not even have to do this but in my application, I did.  I first used a 'tin snips' to cut off the excess but ended up using a pair of 'shop scissors' to do the job.  The 'tin' isn't very heavy duty but if used/installed properly, it doesn't need to be.

I read the reviews prior to purchasing and some talk about 'taping the seams' with aluminum tape.  I haven't used this long enough to find out how necessary this step is but the seams seemed tight so.............