Karin Realbrush PRO markers each contain 2.4 ml of water-based paint. Thanks to the "liquid ink" technology featured in Karin markers, the ink remains consistent in quality and vibrancy until the last drop. They are twice as efficient as traditional filter markers. In addition, they are equipped with a Japanese real brush tip. They contain non-toxic paints with intense dye-based color. They contain non-toxic paints with intense dye-based color. The colors can be mixed and lightened, and tonal transitions can be achieved by contacting the ends of two marker tips. Store vertically.