ISOK PRO 2000 PUFFS – ENERGY DRINK. It pre-filled 8mL nicotine salt e-liquid, having 5% or 50mg of the nicotine salt strength for an accurate cigarette-style throat hit, and a small discreet profile that fits within the palm of the hand. The ISOK PRO DISPOSABLE maintains a 1200mAh battery offering assured usage until the last drop.