This pen has a double tip and contains black water-based dye ink. On one end is a brush that’s similar to a calligraphy brush and makes it easy to create different strokes, while on the other end is a hard brush tip that is stiffer and easier for beginners to use as they have more control.
Fude pens are a type of brush pen used traditionally for Japanese calligraphy but are a great tool for many artists. The brush pens either have brush tips made with brush fibres or fibre/foam tips that mimic a brush shape. They are roughly the size of normal marker pens making them convenient to travel with and easy to pack away.