Colours included: Cool Grey 1. 160, Cool Grey 2. 159, Cool Grey 3. 158, Warm Grey 1. 278, Warm Grey 2. 277, Warm Grey 3. 276, Neutral Grey 1. 133, Neutral Grey 2. 132, Neutral Grey 3. 131, Olive Green 281, Olive Black 447, Black 030

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.