The Herakles Pro leads the pack in the Herakles tank series! It comes equipped with 4.5mL liquid capacity, quad adjustable airflow slots, convenient top fill design, and an overall bigger diameter that measures 23.8mm. When compared to their previous Herakles Tanks, the Herakles is an all-around better performer, it offers better flavor, better vapor, and is easier to maintain. Factor in a new set of high performance long lasting coils and you’ll be vaping non-stop! Never again will you have to sacrifice flavor for clouds with the Sense Herakles Pro Tank