F-01 to F-10 are the Opal Series. They have multiple layers that combine different colors and thick textures to create depth and dimension.
F-11 to F-13 are the Pearl Series. Sweetie may mix with the YHH Non-wipe styling gel.
F-14 to F-16 are high-density and delicate Earth Color Metallic Gels. They are very shiny. After applying the non-wipe top gel, Sweetie may use them as the 3D Styling Gel and liner gel( Sweetie may create fine drawings by using this series)
F-17 to F-20 are the Earth Color Higher Granularity Metallic Gels. They are versatile!