The Aspire ET-S BDC is a new style of bottom coil clearomizer featuring dual heating elements to provide more vapour. This clearomizer is constructed of metal and pyrex glass . the outer metal casing protects the glass, but includes a window so that you can see your e-liquid level at all times. It comes pre-loaded with a 1.8ohm dual coil BDC head. The Bottom Dual Coil (BDC) design is a major upgrade when compared to similar single coil tanks not only because of the dual coils, but also because of the uniquely designed replaceable coil and airflow system. It was designed differently to eliminate common issues such as an airy draw, gurgling, and leaking that users often experience with other BDC tanks. It also works to eliminate outside influences on flavour to provide a true and pure taste experience. This clearomizer has an eGo thread Compatible with 510/eGo Devices.