I have ordered a BUNCH of cartos from puresmoker.com (1.49/carto, which is a pretty good price). they are listed at the "genuine joye 510 cartomizer" on the site. HOWEVER, when i ordered from another site and selected the "genuine joye 510" cartos, i got a much shorter carto that does not work NEARLY as well. PS sells THIS variety, too as the "BE Cartomizer". but since you really can't use the cone on the short 510 cartos on the eGo, i'm trying to figure out what these are actually called. anyone ever try them? they work GREAT.