The Tombows Fudenosuke brush pens are perfect for hand lettering and calligraphy, but also popular amongst illustrators and artists. This model, called WS-BH, has a slightly harder brush tip, if you prefer a soft brush check out the Tombow Fudenosuke WS-BS Calligraphy Brush Pen, Soft. The pens are filled with black water-based ink. The line width varies from thin to wide depending on the pressure exerted on the tip, the hard brush is particularly suitable for more detailed lettering and drawings.