T487BK Yocan UNI Portable black Box Mod is the answer to your cartridge vape issues. The UNI is made to fit all sizes of oil cartridges so you don't have to bother if it will fit or not. The unit accepts diameters up to 12mm and has adjustable height. The 650mAh battery will make the user going all day and the level window allows you see how much product is left at a glance. Other features include 10 second preheat mode, magnetic 510 threading, adjustable voltage settings, and pass-through charging.