Ecoline Brush Pens are a liquid watercolour with transparent water-based dye ink. They have a 5mm flexible brush nib that goes to a finer point.Use these Ecoline Brush Pens for sketching, drawing, calligraphy, fashion design, illustration and watercolour effects.The Royal Talens Ecoline brush pen is very user-friendly. Handy when travelling and ideal when working at a place that needs be kept clean. The brush pen is ready for immediate use, and is odourless as well.You can use the Brush Pen for thin, precise lines or for energetic strokes, but also for filling in large colour sections. The Brush Pen is suitable for both a quick sketch and adding the finishing touches. The concentrated formula of the Talens Ecoline in the Brush Pens ensures for a seamless transition with the Talens Ecoline from the bottles Using the special Brush Pen blender, colours can be mixed or subdued, and some wonderful wash effects and colour transitions can be created. This set contains 5 green blue colours.