The dART v2 cartridge is designed to optimize your vaping experience. In order to maintain a consistent hit, we have updated to heating element to a ceramic cell. The cell acts as a a heating chamber that the concentrate can slowly work its way through as it vaporizes. This allows a consistent and smooth hit. The ceramic cell heating element is housed in a sturdy glass tank. The dART v2 cartridge also has an updated mouthpiece that is ceramic, choose between a white or black tip.The cartridge comes in 0.5mL and 1mL.