These cartridges are specifically designed for the Doric Galaxy Pod Kit. Each pod has a built-in mesh coil which means great flavour production and no hassle as once the coil burns, you replace the whole pod. Available in 2 different resistances, you can pick whether you prefer a more or less intense hit.  Doric Galaxy cartridge has a 2ml capacity which can be replenished via the silicone-covered side-fill port. Simply remove the plug, tilt the pod to the side, fill to the top and replace the plug. Product Features: Pod Material: PCTG Resistance: 1.2 ohm & 0.7 ohm Pod Cartridge Capacity: 2ml Type: Cartridge With Built-in Mesh Coil Filling Type: Side Filling Compatibility: VOOPOO Doric Galaxy Pen Kit 2 Pieces in Per Pack