The atomizer contains nickel foam (the mesh-like wicking material) a ceramic heatsink (around the coil) and a coiled heating element (I assume it is steel, could be wrong) surrounded with a wick. There are also insulated copper wires in there. It's construction is much more complex than that of a cartomizer, which is a in essence a bunch of wadding wrapped around an uncoiled heating element with a braided wick separating the two. The simple cartomizer does not contain costlier parts like ceramics or foam nickel. I hope this helps.