The Smok TFV9 Replacement Coils, which with the gold-plated pin to increase the rub resistance, the Smok Coils made of nichrome material that features a large heating contact surface area with e-juice, will heat the juice fastly and evenly, will produce the huge clouds and superb flavor with the less heat time, with the longer lifespan, no need to replace the Coils frequently. The Coils specially designed for TFV9 Sub Ohm Tanks.