Pentel Color Pen Set, Water-based, Fiber Tip, 6 Assorted Colors Water-based ink pens come in a set of brilliant colors. Feature a durable fiber tip for both thin and bold lines and well-balanced, easy-to-hold barrel. Generous ink supply is excellent for decorating posters. Snap-fit cap prevents tip from drying out. Use for everyday drawing, coloring, and writing. Color pens are ideal for artists, designers, students and children.