The Tombow Fudenosuke Soft Tip Brush Pen features a flexible elastomer brush tip. Its soft tip works beautifully for different lettering and drawing techniques. It is also great for calligraphy and artistic drawings. Artists and calligraphers can create extra-fine, fine, or medium strokes by changing brush pressure. The barrel is made of recycled polypropylene plastic. The pigment black ink is water-based and odourless.