Uwell Crown 5 Tank is an upgraded sub-ohm vaping atomizer, continues the design of its predecessor, Crown IV tank, and adds some new technical highlights. In terms of appearance, Uwell Crown 5 Tank is shorter but wider. Uwell Crown 5 Tank is 29mm in diameter, made of stainless steel, and finely polished to give it a bright luster and smooth feel. This tank includes a durable Pyrex glass tube with a 2mL e-liquid capacity. The Crown 5 Tank hosts a simplified quarter-turn threaded top fill system for faster refills. Thanks to the additional silicone seal, the e-liquid can stay in the tank and will not be lost during the filling process. Inside the Crown 5 Sub Ohm Tank is Uwell's patented self-cleaning technology that turns condensation into vapor before it can even build up within your atomizer, thus further protecting you from leaking problems. In addition, within the atomizers is the patented Pro Flavor Core Optimization System or Pro-FOCS for short. Pro-FOCS Flavor Testing Technology provides vapers with the ultimate vaping experience by properly controlling the heating temperature, strictly managing the material quality, and completely restoring the e-juice flavor. Uwell Crown 5 sub ohm tank is used together with UN2 mesh coils. There are three types: UN2 0.23ohm Single Meshed Coil; UN2-2 0.3ohm Dual Meshed Coil; UN2-3 0.2ohm Triple Meshed Coil. All versions use mesh instead of a regular coil. In this way, a more direct and intensive taste development is achieved. The package includes the UN2 0.23ohm Coil and UN2-2 0.3ohm Coil. With the help of a quick plug-in system, the installation of the coil can be completed immediately. Along the base of the Crown 5 Sub Ohm Tank is an adjustable airflow ring that can be fully closed for a more restricted vape.