Tombow Dual Brush Pens combine a flexible brush tip and fine tip in one marker. The brush tip works like a paintbrush to create fine, medium, or bold strokes, with a resilient nylon fiber brush tip that retains its point stroke after stroke. The other end features a fine tip that gives consistent lines for sharp details. With either end of the pen, introduce some water to your paper for a wonderful watercolor effect. Every pen holds blendable, acid-free, odorless, and resilient water-based ink. Ideal for fine art, illustration, hand lettering, and more. Also works well in applying to a rubber stamp for unique stamping colors, and the lighter colors are popular being used as a highlighter.