Vaporesso GT Coil (3-Pack)GT Cores are specially designed to fit in to the NRG tank series. It comes in traditional cotton and Vaporesso significant CCELL ceramic in different resistances, from GT2 to GT8, total 5 coil selection to choose from. Gear up with GT Cores as you desire.  GT2 :· Atomizer Resistance: 0.4ohm (40W - 80W) GT4 :· Atomizer Resistance: 0.15ohm (30W - 70W) GT6:· Atomizer Resistance: 0.2ohm (40W - 100W) GT8 :· Atomizer Resistance 0.15ohm (50W - 110W) GT MESHED :· Atomizer Resistance: 0.18ohm (50W - 85W) GT CCELL :· Atomizer Resistance: 0.5ohm (20W - 40W) GT4 Meshed :· Atomizer Resistance: 0.15ohm (50W - 75W) INCLUDES :· 3 x Replacement Coils