Flat metal mouth tips for use with our cartomizers and a range of vape tanks, including the Nova, Evod 2, Protank 3, Mini Protank 3 and Aero Tank. Mouth tips should generally fit securely, though in some cases they can become loose when a tank is left on its side. The mouth tip may also become loose if a build up condensation appears in the well on top of the tank. If this occurs, dry off any excess moisture and wipe down the mouth tip before reattaching. Never attempt to pick up your e cigarette by the mouth tip.