1A variety of bright colors, including the artist's need to draw lines and details, drawing, sketching, highlighting, journal, signature, illustration, graffiti, hand-painted letters, shadows, rendering, comics, etc. 2These watercolor pens are suitable for professional art, adult coloring books and handicrafts. 3The 0.5 mm fine nib is used for fine contours and fine lines, and the 1-3 mm nylon fiber brush head is used for shading and coloring. 4Dual pointed marker pen, because of its precise line control, excellent color mixing and glossy stroke flexibility, it is easy to achieve clean thick or thin lines. 5Used for coloring, and the 0.5mm fine pen tip is used for details. It is possible to obtain both colored marker pens and colored thin line pens.