Colorful Color Ink Color Multi-color, Multi-color Age Range (description) Children Material Plastic Tip Type Fine Special Function Retractable Number of Units 1.0 Unit Model Name HYDN-BallPen Recommended Use For product sketching See more About this item Efficient and practical: The 10-in-1 feather-weighted retractable design allows quick and easy color replacement for the pen. It can improve your work efficiency and reduce the hassle of carrying different pens in various colors. Smooth Writing: 0.5 mm tip provides fine, sturdy and even general writing lines, even, fade-resistant and readable ink. Wide Application: The 10-in-1 ballpoint pen has 10 different colors; you can use ballpoint pens in different colors to highlight important content in books or notebooks, help with memory retention; also suitable for children's coloring. Ideal Packaging: The package includes 4 multi-color ballpoint pens; each multi-color ballpoint pen has an excellent, new and creative packaging design; perfect gift for friends and children.