It is two 60,000 BTU burners. Includes two 4' tank hoses, LPG valve, and regulators. Bought a year and a half ago and used just a handful of times. Great condition. Bought them for a hundred each, will sell both for that. Half price!
Small batches would probably be ok, but I would be leery of putting anything bigger than a five gallon kettle on those things. There sure isn't much in the way of metal holding those burners up (you can see both the width and the thickness of what little there is)...
I have a 15gal SS MT and a 20gal SS BK. Worked just fine for me for over a year and tons of batches. Very secure and stable. I'm guessing you haven't you seen these at your LHBS?
Here are some reviews from others doesn't seem to be an issue for them.