he K3 Tank is the perfect tank for vapers who are looking to experience premium MTL vape. The K3 features 4 air holes and a 1.8Ohm coil making a perfect combination for the perfect throat hit. The tank conveniently holds up to 2ml of e-liquid, which is quite impressive for the size of the tank. You can expect great flavor and vapor production from the K3. Black . Nautilus BVC coil are inexpensive and reliable. Works on most batteries. 510 thread. Great tank to emulate cigarette smoking.