Uwell Valyrian Replacement Empty Pod Cartridge is made of PCTG that is an open-type cartridge with a capacity of 3ml. Fill the pod via the sliding top cap, this design reduces leakage while being able to easily fill your favorite e-liquid or nicotine salt e-liquid. So you don't even have to disassemble the Valyrian Pod. There is an airflow control switch on the side of the pod. If you want a smoother airflow or tighter draw, you can adjust the intake air up and down. Compatible with two different types of coil, 0.6ohm coil for Restricted DTL, and 1.0ohm coil for MTL. At the same time, the simple bottom coil installation process can easily replace the coil when necessary. One empty pod per pack.