510 clearomizer has the lastest bottom coil system. No visible coil. No leakage. Easy to fill. It has a normal 510 threading, so it will work with most batteries with a 510/eGo threading. Each clearomizer coil is imprinted with its resistance and the recommended battery output voltage such as. 2.8ohm (3.0-3.8v) 3.2ohm (3.0-4.2v) 3.9ohm (3.0-5.0v) Please be sure that you choose the right clearomizer for your battery and get the best throat hit. It has the same diameter as 510 Manual Battery. So they look perfectly together. The clearomizer coil are not replaceable. Ecig Best Save carries 510 Startet kit that come with 510 clearomizers. Unit: 5pc/Pack Size (excluding threading):length 2.24"(57mm)/diameter .36(9.2mm) Capacity:1.0ml Color:clear Threading:510/eGo Resistance: 2.8ohm/3.2ohm/3.9ohm Package: Black Paper Box.