The OVNS W01 Cartridges are compatible with the OVNS JC01 Pod System Kit & Pod System Battery. The OVNS W01 Cartridges have a 0.7ml reservoir that is refillable through its convenient top-filling method. The cartridge has a 1.8Ω coil. The W01 Cartridges come in a single pack of 3 empty pods. Get your W01 Cartridges from RichMountainDist.com today.