The Toptank Mini is an upgraded version of the popular Subtank Mini. The Toptank Mini now comes with a top-fill option for easy juice refills and supports the new Kangertech SSOCC coil heads. This device features a 22mm diameter, standard 510 threading, 4ml Pyrex Glass tube and improved adjustable airflow valve. The Kanger Mini RBA Plus Deck is also included in this kit and allows advanced users to build their own coils. The Kangertech TopTank Mini comes with a 0.15ohm Ni200 SSOCC atomizer head pre-installed.