The SMOK TFV12 V12 Replacement Coil Pack brings the world class and industry leading coil designs implemented in the TFV8 series to another level, with V12 versions of the popular X4 and Q4 coils range of 60 to 220W and 60 to 190W, respectively. The V12 RBA Head is one of the most capable in it's class, with an 18mm diameter deck that integrates a two post, dual terminal design with each terminal measuring 2mm in diameter. Ample airflow feeds into the V12 RDA, with dual 8mm by 5mm internal airslots while wicking is efficient due to the unified wick port designs. The V12 RBA-T Head is a Triple Coil RBA head with a postless build deck and large central airflow channel. The RBA-T has side mounted hex screws terminals located in the build deck and positive contact, with unified wicking ports. Warning: Never use a short or flat 510 connection on any hybrid or hybrid style device. If unsure whether this pertains to your particular set-up, DO NOT assemble and use. Always use proper precautions and handling Coil Specifications: SMOK V12 Engine Coil Family V12 X4 Quadruple Coil Head 0.15 ohm Patented Quadruple Coil 60 to 220W 100 to 170W Recommended Range V12 Q4 Quadruple Coil Head 0.15 ohm Patented Quadruple Coil 60 to 190W 90 to 160W Recommended Range V12 T6 Sextuple Coil Head 0.16 ohm Additional Wicking Ports Auxiliary Wicking 90 to 320W Range 120 to 180W Recommended Range V12 T12 Duodenary Coil Head 0.12 ohm 60 to 350W Range 130 to 200W Recommended Range V12 T8 Octuple Coil Head 0.16 ohm 70 to 320W Range 120 to 200W Recommended Range V12 X4 Quadruple Coil Head 0.15 ohm 60 to 220W Range 100 to 170W Recommended Range Advanced User Item. Use at Your Own Risk!