Kangertech Subtank Vertical OCC heads for use with Kanger Subtank. Coils are available in resistances of either 0.2 ohms(sub ohm ) 0.5 ohms (sub ohm), 1.0 ohms, 1.2 ohms or 1.5 ohms . The Kangertech Subtank vertical coils are the second generation of coils with vertical coils instead to horizontal coils design that allows higher wattage use and bigger clouds production .