Bohr Hunter Pod includes two types of cartridges that are organic cotton coil and ceramic coil. The cotton coil features 1.6ohm resistance. With high-quality organic cotton, it will restore the e-juice flavor. It is better for 15-25mg e-juice. When you fill in e-juice into cartridge, you will see the e-juice are absorbed quickly by cotton. At this time, you inhale to start vaping and get better flavor in first puff. If you are enthusiast of high nicotine or CBD oil. The ceramic coil cartridge is your best choice. It features 1.2ohm resistance. You could use e-juice above 25mg. It is also very suitable for CBD oil. The ceramic coil will produce purer flavor and strong clouds. So whatever e-juice you prefer, the Bohr Hunter Pod will be satisfied your vaping needs perfectly.