Karin Brushmarker 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 super durable and flexible nylon tip. They contain non-toxic paints with intense dye-based colour. The colours can be mixed and lightened, plus tonal transitions can be achieved by contacting the ends of two different marker tips. Store vertically.