[MULTI-COLOR]: Add more lovely colors to your homework desk or office desk. Callie provides a total of 14 colors for you to choose from to meet your different needs. For example, if Monday is busy, choose a red pen cover, Saturday is happy, choose a pink pen cover, etc., choose the color according to your mood. The refill also has 3 common colors, red, blue, and black, which can satisfy you for taking notes and clearly distinguish various marks. 

[SMOOTH WRITING]: Use durable pen refill to prevent scratches on paper, smooth writing, and the most powerful assistant for writing inspiration. 

[CUSTOMIZATION]: You can choose to print your own name or your favorite text to make your pen more unique and exclusive to you. It can also prevent confusion with classmates or colleagues, and they will return your pen when they find it. 

[SIMPLE DESIGN]: The overall design is simple and cute, classic and elegant, showing the master's good aesthetics. 

[GIFT OCCASIONS]: On Teacher's Day, Children's Day, the school season, Christmas, it is most suitable to give such exquisite gifts to your teachers, students, or children, classmates, colleagues.