The SMOK TFv12 Prince Strip Coil is the new, revolutionary 0.15ohm coil designed for the SMOK TFv12 Prince Tank. It is made of Kanthal and a porous structure with a greater surface area for faster e-liquid absorption and even heating. Recommended wattage range: 0.15ohm: 40W-100W (Best: 70W-80W) (3 per pack)