During my search for an extra CO2 tank, I stumbled across
these on ebay. The price is right and the size of this tank could be better than the standard, squat 5# CO2 tank if space is tight. Plus, at 7#, you get an extra 2# of CO2. I have a converted Sanyo kegerator and it looks like it would be just a bit too short to accommodate this tank. But if your kegerator is tall enough, this would be awesome.