These are specially made for the NRG tank. The absorbent ceramic coils give maximum flavour and cloud of your juice in compared to cotton coils, the ceramic also helps avoid dry hits and lasts much longer.
GT MESH - Mesh wire 0.18ohm 50-85w, BEST 65-80w
GT 8 - Quad coil 0.15ohm 50-110w, BEST 60-80w
GT CCELL - Ceramic 0.5ohm 20-40w, BEST 30-35w