The VOOPOO UFORCE Coil is designed for UFORCE tank or VOOPOO TOO Kit, which brings great flavor and vapor production. Available in 0.4ohm U2 coil and 0.23ohm U4 coil. 5pcs each pack. Just get them as spare parts for your UFORCE.
Resistance: U2 0.4ohm dual coils (40-80W/best 55-65W);
U4 0.23ohm quadruple coils (50-120W/best 60-80W)