There are several major upgrades I need to do to the overall site, updating the Products Page being one of the big ones. Most of what is listed there is not really for sale anymore. The HHO cells are not ours, but from a small inventory we acquired (a little over 100 units). We have no intent to make more. Furthermore, they are 304 stainless, and not the best quality. They make for inexpensive "let's have some fun" type cells, or something for a small engine/motorcycle. The best HHO cells I've ever been pleasured to use are from Ed Grimm (retired NASA) at Infinity Industrial in Clearwater, FL (although they don't list their HHO systems on their main web site).
References to HHO (on the
Expounding on Expansion page) really relate to any
decent system, not the egg beaters in a glass jar crap.