This Vaporesso XROS replacement cartridge is designed for the XROS product line like Vaporesso XROS 3, Vaporesso XROS Mini, Vaporesso XROS Nano … You can add up to 2ml vape juice into this pod via top filling hole. The transparent window allows you to check the juice level without opening the pod. The pods come in a pack of four containing pre-installed 0.6ohm, 0.7ohm, 1.2ohm, 1.0ohm, or 0.8ohm coils. Whether you prefer a tight DTL or a loose DL vaping, these XROS pod easily covers your need.