Kangertech Subtank Vertical Organic Cotton Coil (OCC) is a newly invented and patented coil which produces huge vapor. It makes use of organic cotton which brings healthy and environmental vaping. E-juice vaporizing of Vertical OCC is as much as RBA. Parameters Material: Organic cotton and stainless steel Resistance value: 0.5ohm (range 15~30W)and 1.2ohm (range 12~25W) This product comes with 5 X Kangertech Subtank Replacement Vertical Organic Cotton Coil (OCC) Simple packing. Customary packing from the factory, the packing is subject to change without notice. Features 1. Vertical Coil 2. Organic Cotton Coil (OCC) 3. New patented coil head 4. Japan made cotton 5. Square outer casing: last longer, provide purer taste and has a larger heating section. Subtank Vertical Organic Cotton Coil How to replace the OCC 1. Screw the base off connector firstly. 2. Pull out the OCC atomizer head from the base and replace a new one. 5 pieces per pack. It's for Kangertech Subtank Pyrex Glass Cartomizer with OCC (Organic Cotton Coil). There are CE mark on the atomier head.