Valyrian 3 Tank features updated pro-focs flavor testing technology for ultimate vaping experience, self-cleaning technology for leakproof. It can hold 6ml e-juice, is compatible with Valyrian II 0.15ohm and 0.16ohm coil. There are two new coils in the package to bring you more enjoyments. You can press the button to fully open the flip cap and refill e-juice conveniently.