The Valyrian measures 25mm in diameter and features sleek and smart design elements that combine for a universally appealing design. The Valyrian features a heat insulated flip top fill method, with a press of a button the top pops open and reveals dual 3mm by 8mm fill ports. The Valyrian utilizes the new inner coil pins, each differentiates through flavor and airflow change, customizing the tank internally for each users preference. Three 8.5mm by 3mm triple adjustable bottom airflow makes for smooth and effective airflow, and can be fully closed to seal the system effectively. The Uwell Valyrian Sub-Ohm Tank is an excellent and revolutionary tank with superior construction, an all-new interchangeable inner coil pin system, and ergonomic designs throughout.