The RBA 16 core only can work on TFV8 tanks only, this is huge size octuple core fused clapton with airflow, pre-installed 0.16ohm coil, can work from 40w to 100w, best work at 80w.
V8-X4 quadruple core resistance is 0.15ohm,double-barreled pistol design, it's cloud and flavor balance coil,can work at 60w to 150w, best work at 80w to 120w, 3pcs per pack.
Click here to buy TFV8 Replacement Coil Heads
And click there to purchase TFV8 Cloud BEAST tank with coil heads
V8-X4 quadruple core resistance is 0.15ohm,double-barreled pistol design, it's cloud and flavor balance coil,can work at 60w to 150w, best work at 80w to 120w, 3pcs per pack.
Click here to buy TFV8 Replacement Coil Heads
And click there to purchase TFV8 Cloud BEAST tank with coil heads