The updated Aspire CE5-S has a new coil design – Bottom Vertical Coils. The new bottom vertical coil is designed for richer taste, greater stability, longer lifespan, and fuller vapor. This clearomizer is constructed entirely 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 BVC head. The Bottom Vertical Coil (BVC) 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 BCC tanks. It also works to eliminate outside influences on flavor to provide a true and pure taste experience.