They use the Concord 60qt pot, which is a pretty good value if you ask me. The total volume is just slightly more than the advertised 15 gallons I believe. I have two of the Concord kettles which I plan to use as HLTs and I'd say they are worth the money. They feel nice and sturdy. They don't have the sandwich bottom construction which I personally want for my boil kettle, but overall, for a value pot I'd say it's a good deal.