VOOPOO UFORCE-L Tank is the first atomizer that adopts a top-to-bottom airway with a leakage-proof function. The triple air inlets balance the airflow, reduce convective flow and smooth the vapor effectively. Powered by Dual In One Tech, 2 upgraded PnP coils boost a powerful cloud and multi-layered flavor. UForce-L tank: Dimensions: 25.5mm x 58mm. Capacity: 4mL / 5.5mL (TPD: 2mL). Material: Stainless Steel + Pyrex. Resistances: 0.2ohm (PnP-TW20), 0.15ohm (PnP-TW15). More Smooth Flavor. Includes: 1 x UFORCE-L Tank (4mL). 1 x PnP-TW20 (0.2ohm). 1 x PnP-TW15 (0.15ohm). 1 x Spare Glass Container (5.5mL). 1 x Silicon Rubber Pack. 1 x User Manual.