The new 510 Dual Coil Tank from SmokTech, the leader in dual coil cartomizer technology. These tanks contain a 1.6 ohm SmokTech stainless dual coil cartomizer and hold 6ml of liquid. The tank keeps the cartomizer fed through a small hole in the side so it can provide non-stop vaping pleasure all day long without having to refill. And it comes with a Black dripper tip included! The tank is easy to refill with either a syringe or a standard dripper tip squeeze bottle. It has O-rings built in so there is no leaking. Please see pictures on refilling steps.