The Dual-Tip Brush Pen Set by Tombow contains 96 professional-quality markers and a handy desktop display for easy storage. The markers feature a flexible nylon brush tip as well as a fine tip for smooth lines. Whichever tip you use, a single ink reservoir ensures that the color will be perfectly consistent. Create fine, medium or bold strokes simply by changing the pressure on your brush tip. The fine tip allows you to do detail work, draw consistent lines, or add the pop of color you want in tight spaces. Use the included colorless blender to do shading or try dipping the brushes into water for a subtle wash effect. The tips will retain their point thanks to the nylon design, and they'll also self-clean after blending. Ink is water-based, acid-free, odorless, and non-bleeding.