Horizon Aquila Tank features a plug-in-out changing method at the bottom base, making coil replacement a breeze. It comes with a pre-installed coil: E1 Dual Mesh Coil 0.16ohm (60-70W). Top filling, a one-click spring-loaded button, and filling the e juice from the top provide a 5ml e liquid capacity. Airflow control ring on the bottom with dual slots and mesh coil compatibility. The Updraft Rising Airflow design is a perfect match for the E1 and P1 Coil structures, with the goal of maximizing smoothness sensation via vertical-ventilation updraft to intensify cloud density and essence extraction.