This is a clearomizer for the Aspire BDC Mini Nova. It is a set of bottom coil clearomizers, which have a dual coil design which means that there are more flavor and vapor for you to enjoy. They also have a better coil design which also improves vapor and flavor. All clearomizers boast improved airflow mechanics. Due to this upgrade they will not be leaking or gurgling, which can happen to some devices. The coils are really cheap to replace making this set a really cost-effective choice. It has a 2.5ml tank and is 510 threaded. Therefore, it will fit all eGo type batteries and 510 threaded devices. It has a 1.8-ohm dual coil already installed which is replaceable. The glass tank gives a really pure flavor. The clearomizers come in a wide choice of colors, enabling you to pick from black, steel, blue, red, green or purple so that you can pick something the suits you. Although these are budget tanks, they offer really great value for money and allow you to enjoy any flavor you decide to add as well as dense clouds of pure vapor.