2. Square outer casing: last longer, provide purer taste and has a larger heating section.
3. Dual coil
4. Organic Cotton Coil (OCC)
The OCC(Organic Cotton Coil) coil heads for Subtank from Kangertech is newly invented which can produce huge vapor. This new coil uses organic cotton can make your vaping more healthy and environmental. The OCC coil is made of stainless steel with organic cotton specially designed for Subtank. E-juice vaporizing of OCC is as much as RBA.