This set contains three pens including 2 Micron fineliner pens in the sizes; 0.3 (0.35mm), 0.5mm (0.45mm) & one Graphic pen (1.0mm). The Sakura Pigma ink is designed not to bleed through paper & is lightfast, making them perfect for h&-drawn artwork. The Archival Quality ink is also indelible, & 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 & fade proof ink, perfect for work in journals or card making.