Vaporesso MTX Coil is crafted for Vaporesso iTank M Tank and features MTX 1.2ohm, 1.4ohm, and 0.8ohm coil for MTL vape with high nicotine e-liquid. The MTX 1.2ohm coil is best for the wattage between 8W and 12W. it is replaced via plug-n-play installation