Koi Colouring Brush Pen Set 24 Pack. Ideal for drawing, illustration, designing & sketching! These brush pens have a flexible brush tip with which you can simply draw lines of various thicknesses. The ink is water-based and enables wonderful colour gradations to be created. Pigma Micron is recommended for outlining before colouring with this item. Available in 48 colours & a blender, each sold separately. This Package includes 24 colouring brush pens (yellow, orange, pale orange, woody brown, dark brown, brown, vermillion, red, pink, burgundy, fuchsia, lilac, iris, purple, sky blue, peacock green, yellow green, green, sap green, fresh green, blue, light sky blue, prussian blue and black).