Smok V8-T8 Octuple Coils The Smok V8-T8 Coils are patented octuple head coils designed for the SMOK TFV8 Tank. In a 3 pack they provide massive vapour and taste. For optimum performance, the coils are best vaped between 120-180 Watts.Made from high quality Kanthal, Turbo: 6.6T, resistance 0.15 ohm - 50W-260W / Best 120W-180W To achieve the best vapour clouds and taste of your favourite e liquid we suggest that the coil should be replaced every 1 to 3 weeks, depending on the frequency of usage