As we known, crown series always the star of Uwell.  Now Uwell is introducing a new member of Crown family- Crown IV tank. Crown IV tank comes with a Stainless Steel construction, which makes it durable and gorgeous. The tank adopts a bubble pyrex glass tube to hold 6ml large capacity of e-juice. With advanced patented self-cleaning technology, the tank can absorb the e-juice in the condensation holder through regular usage and vaporize it.