Product review (5 stars): Fit perfect!
I ordered this after finding out they no longer sold the stacking kit at any of my local hardware stores (Lowes, Homedepot, HH Greggs, or Bestbuy).  I used some PlastiDip and painted it black to  make my units.  Saved a lot of need space by stacking  them. I'm not sure why everyone doesn't stack their units.