The 520 Tank is an RBA and a bridge from CTHULHU MOD. This unique setup offers an RBA by default, but also comes with a PnP and Nautilus adapter. It is specially designed to reduce L-shaped airflow effect.
The 520 tank has a 4.2ml capacity.
It comes with the following airflow Pins: 0.8mm, 1.0mm, 1.5mm,2.0mm,2.5mm,3.5mm, 4.5mm(without air pin)