The iJoy Captain Sub-Ohm Tank is a premium sub-ohm tank with a 4.0ml e-Liquid capacity and a convenient top fill design with twist off cap. The iJoy Captain features a gold plated 510 contact pin with a 25mm diameter that pairs up great with high powered devices such as the iJoy Captain PD270 Mod. The iJoy Captain features dual wide airflow slots that may be adjusted using the bottom airflow ring. The iJoy Captain utilizes a unique groove design to help reduce heat. This tank also features non-threaded Captain CA atomizer heads for easy replacements. The Captain CA atomizer heads are designed for variable wattage and performs best with high VG based e-Liquid.