Tombow Dual Brush Pens feature two tips on each pen - flexible brush and fine tip in one. The ultra fine nylon tip creates clean, crisp lines for sketching and detail work. The flexible nylon brush creates fine, medium and bold strokes simply by changing the pressure applied. The high quality resilient nylon tips will hold their shape stroke after stroke to create consistent lines for borders, graphics, writing, and drawings. The acid-free colours are non-bleeding, odourless, non-toxic and water based. Colours include: 379 Jade Green, 407 Tiki Teal, 291 Alice Blue, 133 Chartreuse, 985 Chrome Yellow, 905 Red, 856 Poppy Red, 803 Pink Punch, 817 Mauve, 685 Deep Magenta.