FreeMax Fireluke M TX Mesh Replacement Coils are designed for the FreeMax Fireluke 2 Sub-Ohm Tank. Freemax Fireluke M TX Mesh Coils Specs X1: 0.15 Ohm (40W-90W) X2: 0.2 Ohm (40W-80W) X3: 0.15 Ohm (50W-90W) X4: 0.15 Ohm (40W-80W) WARNING: This is an advanced user item. Use at your own risk! Please ensure that proper precautions are taken when using such devices. Please read and make sure you understand the users manual before use.