The Augvape SLIM Pod Device is specifically designed with salt nic and comes disposable (meaning that users do not have to refill their device and can throw it in a electronic waste when finished). Each Augvape SLIM Pod Devices are approximately 400 to 450 puffs, and is meant to be disposed after life cycle.The Augvape SLIM accommodates up to 1.5ml of Salt Nicotine E-Liquid (By CRFT Labs) with the miligram level of 50. Each Augvape SLIM comes with four (4) per package.