The Aspire ET-S BVC (bottom vertical coil) Glassomizer is a unique design with a new heating element coil technology. As bottom coil clearomizer types are becoming popular, the glassomizer is reinforced with an aluminum shield with a visible clear pyrex glass tube and holds approximately 2.4ml of liquid capacity. The tank can be disassembled into four total parts for easy cleaning and maintenance. Coil heads can be easily replaced by unscrewing the bottom end cap. Uses Aspire BVC coils, and is compatible with Aspire's BDC Coils (we recommend BVC for optimal performance).