Sakura -Pigma ink is specially designed not to penetrate through the paper and is non-fading, making them perfect for hand-drawn artwork. With waterproof and fade-resistant ink, perfect for working in journals or cards. The Pigma Micron Pen is suitable for illustrators as each pen is designed for precise lines that are suitable for all your drawing needs. This set contains three pens in sizes: 10 (0.60mm), 12 (0.70mm) and a brush pen (0.5mm to 4mm).