Purchased a few years ago and used a few times. I tested all of them, and they all worked. I don't know how much ink is left. Please refrain from purchasing if you are concerned, as it has been in someone else's possession once. Instant purchase is available! [Product Description] 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 make bold and delicate strokes, taking advantage of the brush's touch, and you can also freely express soft shades 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. Watercolors, sketches, illustrations, and even sutra copying, the uses are truly diverse!