These Dual-Tip Brush Pens from Tombow are preferred by professionals. Two tips - a versatile, flexible nylon brush tip and a fine tip for smooth lines, with a single ink reservoir ensuring exact color match. Create fine, medium or bold strokes by a change in brush pressure or draw consistent lines for borders, graphics and tight drawings with the fine tip. Resilient nylon brush retains its point, stroke after stroke. Tips will self-clean after blending. Create subtle washes by dipping brushes in water. Water-based ink is blendable, odorless, non-bleed and acid-free. Each package includes 96 colors, including a colorless blender for shading and a desktop display.