The ET-S BVC is an upgrade version of ET BVC, it has an exterior metal sleeve surrounding the tank with two small windows that allow you to see how much liquid is left in the tank at all times.

Capacity:  3.0 ML

Compatible Coils:  Aspire BVC Coils

Threading:  Ego Threading

Tank Material:  Glass surrounded by Metal

Air Flow:  Bottom

Drip Tip Size: Proprietary