Tombow Dual Brush Pen Art Marker, 192 - Asparagus, 1-Pack Dual brush pens are Ideal for fine art, illustrations, doodling, journaling, hand lettering and more. Color coded pen caps make color selection a snap! Each water-based, bleed-free pen is blend able with odorless, acid-free ink The nylon brush tip works like a paintbrush to create fine, medium or bold strokes while the fine tip gives consistent lines Single ink reservoir in each pen ensures exact color match Each brush tip self cleans after blending.