Lines draw clean in a rich, solid black and the pen tip doesn't degrade or split over time. Consistent ink flow is perfect for shading techniques such as cross hatching and stippling; The waterproof ink dries quickly and integrates well with watercolor washes. This 3.6x0.5x7.3 inch package contains 5 pens in sizes 0.05mm, 0.1mm, 0.3mm, 0.5mm and 0.8mm.