Yocan evolve plus quartz dual coil:
The Evolve Plus atomizer coils are crafted with Quartz instead of traditional fiber wick for the purest experience, Quartz dual coil guarantees a crystal clean and smooth essence.
Yocan evolve plus Ceramic Donut coil:
The ceramic donut coil that Yocan provide are all ceramic, no lasts longer during use, concentrate saving. Your economy atty choice with 6-12 months long lifetime.