This is a 20-color watercolor brush pen set finished by Akashiya, a company with 300 years of brush-making history. I purchased it about 3 years ago and used only a few colors once. Before listing, I confirmed that all colors produce ink. Photos 7-9 are for reference. The package paper with the product name, etc., shown in photo 7 is not included. Brand: Akashiya Product Name: Watercolor Brush Pen "Sai" 20-color set Product Number: CA200/20V Official Price: 5,060 yen (tax included) [Set Colors] Crimson, Vermilion, Yellow, Young Grass Green, Blue-Green, Indigo, Ultramarine, Purple, Ocher, Brown, Silver Gray, Black, Peach, Pale Orange, Sky Blue, Madder Red, Peony Pink, Dark Brown, Pine Needle Green, Navy Blue ↓ From the official website: 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 to draw boldly and delicately, as well as by adding water to the tip or pre-wetting the paper. You can also mix colors to create your own colors. With Sai, anywhere is your atelier. Watercolor painting, sketching, illustrations, and even copying sutras, the uses are truly diverse!