The UFORCE U2 Dual Coil is .4ohm and is rated for the wattage range of 40-80W. Best performance at 55-65W.
The UFORCE U4 Quadruple Coil is .23ohm and is rated for the wattage range of 50-120W. Best performance wattage 60-80W.
The powerful OCC coil head will bring you the rich flavor. Sold in a pack of 5pcs.