Features Material: Stainless Steel, Pyrex Glass Size: 29 mm × 48.3 mm Tank Capacity: 5 mL FeCrAl UN2 Meshed-H 0.2Ω Coil: 50-60W SS316L UN2 Meshed-H 0.14Ω Coil: 50-60W UWELL presents self-cleaning atomizer technology to help prevent leakage. Top cap uses a quarter-turn feature to make adding juice even easier. The UN2 honeycomb mesh coils can heat evenly and atomize fully. The filler holes have a silicone check valve to aid in filling. The pro-FOCS flavor testing technology from UWELL gives you an unparalleled vaping experience. Plug-pull coil, easier to replace.