not selling or anything-
http://www.scientificutility.com/prod_heat.htmThe 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.pdfHEAT CELL can actually be turned upside down and will not spill fuel- I have never tried this with Magic Stove......