The Kanger Aerotank clearomizer is everything great about the Protank series with all of the flaws worked out. With the introduction of a dual coils, a stainless steel body and an additional coil head this clearomizer stands well above the Protank 1. The Aerotank works with 510 threaded batteries and can hold up to 2.5ml of liquid. It also addresses leaking issues and is considered the top of the line performance tank clearomizers. The airflow adjustment ring puts you in control of how great or little airflow you desire in your vaping experience.