The Uwell Crown uses UWELL's exclusive technology which brings out the best flavor. The Crown features a stainless steel and quartz glass construction. You can customize your vaping experience to your own preferences with an adjustable airflow ring at the base of the tank. The Crown distinguishes itself from other tanks by providing robust flavor and great vapor production using the SUS316 Food Grade Stainless Steel Wire and 100% Japanese organic cotton. For your convenience, the Uwell Crown can also be filled from either the top or bottom of your tank. Use Dual Coil 0.25 ohm, Dual Coil 0.5 ohm, Ni200 (Nickel) 0.15 ohm, and Single Coil 1.2 ohm atomizer heads for the ultimate vaping experience.