Capacity: 2ml Size: diameter 28 mm × height 54.8 mm Material: stainless steel, glass & silicone Patented self-cleaning technology, no leakage. Dual SS904L coil, better corrosion resistance, long-lasting flavour. Double helix mesh coil, heats evenly, excellent flavour. Turn 90° to unscrew the top cap, easier to remove the top cap. All the polish work is handcrafted to present your ingenuity. Uwell Crown IV Tank Coil Specifications: Dual SS904L Coil 0.2 Ω = 70-80 W Dual SS904L Coil 0.4 Ω = 60-70 W FeCrAl UN2 Coil 0.23Ω = 60-70 W