When you want to replace your coils with only high-quality items that will produce the same premium vaporizer experience that you are used to, Yocan has you covered! Yocans NYX Mod Tank can easily be used for long-term use when you replace the dual quartz coils with these! With a set of 5 coils, you can assure that you consistently get the clean and even flow that you are used to with your vaporizer.