Product review (4 stars): Thanks for the extra space !
Shipped in a very thick cardboard box to prevent damage to tin components.  Very easy to follow instructions.  Completed work in less than 20 minutes.  Result is I am now able to move my dryer about 10" closer to the wall, giving me much needed space to open/close the laundry room door.

I probably could have made this up myself, with parts from Lowes, but having the right diameters and the right lengths shipped as a package was worth the extra money.