Selection of the most popular black Pigma Micron pens, designed and assembled in cooperation with Elena Motorina who is a Russian architect, the pens in this set were especially selected for urban sketching and architectural drawings. The set contains 1 Pigma Micron 05 0.2 mm, 1 Pigma Micron 01 0.25 mm and 1 Pigma Micron PN. The unique Sakura Pigma™ ink will not bleed through paper, is permanent, waterproof, fade resistant, quick drying and pH-neutral.