PRO markers contain 2.4ml of ink. They are produced with "liquid ink" technology, so that the color intensity remains unchanged down to the last drop and the ink output can be continuously controlled. They are twice as efficient as conventional marker filters. Furthermore, they are equipped with a Japanese-made nylon tip, which is very resistant and super flexible. They contain non-toxic and intense colors based on dyes. Colors can be mixed and lightened together (tone transitions).
 The thematic set contains 12 colors
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