This is a 3 pack of Smok Prince TFV12 coils. These series of coils are designed for the Smok TFV12 Prince Sub-Ohm Tank. These coils are high performance and contiue the TFV8 series design and function. The Q4 coil delivers rich vapor with a resistance of 0.4ohm, the X6 brings out a silky heavy vape with a resistance of 0.25ohm, from the 0.12ohm T10 decuple coil expect massive clouds, the Mesh coil is incredibly powerful at 0.15ohm, the M4 quad coil has a resistance of 0.17ohm, and the latest coil from this series is the Prince Strip - it is a kanthal strip, has a resistance of 0.15ohm and heats up extremely quickly. See additional information for recommended wattage.