Aspire Nautilus AIO Replacement Pod Cartridge utilizes two types of Nautilus BVC coils rated at 1.8ohm. One for regular e-liquid and one for use with nicotine salts. The Nautilus AIO pod has two capacities optional: 4.5ml and 2.0ml(for TPD). It features bottom filling design by using a silicone plug in the base of the pod. With adjustable airflow system, you can adjust airflow ring freely to enjoy different vaping experience. 1pc in a pack.