SMOK TF Replacement Coils (3-Pack)The TF2019 Replacement Coils featuring BF Mesh Coil and BC Mesh Coils for TF2019 Tank. They are designed for the best flavor and best could. BF mesh has honeycomb shaped mesh inside, providing extremely large heating area for intense flavor. BC Mesh has rectangle shaped mesh inside, which can accelerate the heating process and provide massive clouds of vapor BF-Mesh :· Atomizer Resistance: 0.25ohm (30W - 80W) Bc-Mesh :· Atomizer Resistance: 0.25ohm (30W - 70W) Ceramic :· Atomizer Resistance: 0.25ohm (30W - 60W) Stick Mesh :· Atomizer Resistance: 0.15ohm (40W - 80W) INCLUDES :· 3 x TF2019 Replacement Coils