Although it is new and unused, I tested the functionality using only one color (vermilion) for the purpose of listing it. I will include a sketchbook for those who want it (there is one spot of dirt). ⭐︎ Akashiya Watercolor Brush Pen - 20 Traditional Japanese Colors ~For adult coloring books and watercolor paintings~ Beautiful traditional Japanese colors reproduced by water-based dye ink. "Sai" is a color brush pen that is particular about its drawing feel and colors. You can freely express soft shades by taking advantage of the brush touch, drawing boldly and delicately, as well as by adding water to the tip of the brush or pre-wetting the paper. You can also create colors freely by mixing colors. With Sai, anywhere is your atelier. Watercolor paintings, sketches, illustrations, and even sutra copying, the uses are truly diverse! [Set Contents] Watercolor Brush Pen Sai (Peach/Crimson/Madder Red/Vermilion/Yellow/Indigo/Pine Needle Green/Green Blue/Young Grass Green/Ultramarine/Navy Blue/Purple/Peony Pink/Brown/Dark Brown/Sky Blue/Ochre/Pale Orange/Silver Gray/Black Ink)