This set contains three pens including 2 Micron fineliner pens in the sizes; 0.3 (0.35mm), 0.5mm (0.45mm) and one Graphic pen (1.0mm). The Sakura Pigma ink is designed not to bleed through paper and is lightfast, making them perfect for hand-drawn artwork. The Archival Quality ink is also indelible, and dries to a neutral PH. Pigma Micron pens are suitable for illustrators as each pen is designed to create precise lines. Each pen contains waterproof and fade proof ink, perfect for work in journals or card making.