Fireluke Mesh Coil technology, the Fireluke M supports 40-90w with performance equivalent to even the best rebuildable atomizers. The unparalleled bottom Airflow control system brings you the best and most selections to satisfy your preferences. In the meantime, the innovative Mesh Coil system enables you the smoothest flavor for your vaping experience ever. X1 Mesh Coil Type Kanthal Single CoilResistance 0.15Power Range 40-90WRecommended 80W X2 Mesh Coil Type Kanthal Double CoilResistance 0.2Power Range 40-80WRecommended 70W NX2 Mesh Coil Type Kanthal Double CoilResistance 0.5Power Range 20-50WRecommended 40W