not selling or anything-
http://www.scientificutility.com/prod_heat.htm

The large ones come with the vent/shield and the cross braces-

the smaller ones are just like sterno in shape.

rated run on stove is 8 hours; that is about what I got on my first one.

I have 4 sitting in my garage, and one in my carbox.

MUCH better than sterno- longer life, better design.

I think this one and the HEAT CELL brand are similar- found MSDS on heat cell via google http://www.heatcell.com/HEATCELLMSDS.pdf

HEAT CELL can actually be turned upside down and will not spill fuel- I have never tried this with Magic Stove......