SMOK TFV8 BIG T10-T8-T6-X4 Core Coils Smok is a firm in which you can be absolutly sure. It is a one which always maintain quility. Use Core Coils and do not even worry. V8 BIG T10 Core Specification 0.12ohm Kanthal clapton coil, supports 50 - 300W Best 130 - 190W, which brings you deep and rich cloud taste. Compatible Only with TFV8 Big Tank. V8 BIG T8 Core Specification 0.15ohm Octuple coils, supports 50 - 260W Best 120 - 180W, which brings you cool and smooth taste. Compatible Only with TFV8 Big Tank. V8 BIG T6 Core Specification 0.2ohm sextuple coils, supports 50 - 240W Best 110 - 150W, which brings you cool and smooth taste. Compatible Only with TFV8 Big Tank. V8 BIG X4 Core Specification 0.15ohm Quadruple coils, supports 60 - 150W Best 80 - 120W, which brings you cool and smooth taste. Compatible Only with TFV8 Big Tank. Package Includes: 1 x 3pcs SMOK TFV8 BIG CoilsNote: NOT Compatible with TFV8 Baby & TFV8 Big Baby Tanks.