Marsgraphic duo - Double-ended watercolour brush pens. Box of 18 colours. The new double-ended watercolour brush pen is perfect for illustrations, detail work, manga and colouring with watercolour effects. The durable brush tip and the fine tip can be used with or without water for colouring and beautiful details. Double-ended watercolour brush pens, Flexible like a brush, a pen or watercolours. Ideal for variable strokes and shading. Line width brush tip approx. 1.0 - 6.0 mm. Line width fine tip approx. 0.5 mm - 0.8 mm. 18 colours in hangable clear box.