The Aspire K1 Glassomizer tank is compatible with all eGo threaded battery. With a durable Pyrex glass encasing the tank, you’ll be able to see your eLiquid level at all times. This tank uses the Aspire BVC coil ,which are made to withstand the test of use. The stainless steel mouthpiece is super easy to clean along with the rest of the tank .The tank has a very clean and elegant look. This tank holds 1.5mL of eLiquid.