The Herakles replacement coil heads feature sub-ohm resistance of 0.2ohm and 0.6ohm. With Japanese Organic Cotton in each coil, it is a better and healthier choice in every hit.The Herakles replacement coil heads feature sub-ohm resistance of 0.2ohm and 0.6ohm. With Japanese Organic Cotton in each coil, it is a better and healthier choice in every hit.