Smok TA Coil is compatible with Smok T-Air Subtank.5 pieces Per Pack.It is made of FeCrAI Alloy.There are three option coils for your choice: TA 0.2ohm Coil 2in1 Single Meshed power at 50-70W,Best 65W.TA 0.15ohm Dual Coil,Dual Meshed power at 40-60W,Best 55W.TA 0.4ohm Coil power at 20-45W,Best...