SMOK - TFV12 Prince V12-X6 Coils 0.15 Ohms (Pack of 3) Smok Sale! from £10.99 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. SMOK - TFV12 Prince V12-X6 Coils (Pack of 3) This pack contains 3 SMOK V12-X6 Coils, featuring a resistance of 0.15 ohms and capable of firing between 50W-120W. These coils are compatible with the SMOK TFV12 Prince Tank.