Cartomizers, Clearomizers, and Tanks both disposable and rebuildable.
Designed for the Mini-eCigs with an 808D connector
Designed for the 510C eGo, EVOD, and some Variable Volt eCigs.
Designed for 510C type ecig batteries, as well as being rebuildable.
The difference between 510C and 510U, is the 510C has a cone around the bottom of the tank so it is sort of an innie, where as the 510U has no cone and the 510 threads are visible, so it is more of an outie.
Tanks Designed for Bigger Sub-Ohm and Temp-Control Mods.