These Portrait Dual Brush Pens are water based and are available in 9 colours with a colourless blender pen. The markers are dual sided with a flexible brush tip and a fine tip. The brush tip can create fine to bold strokes, and the fine tip is perfect for more detailed and intricate designs. As the markers are water based, they do blend, but will also smear pencils and other inks. The makers are highly pigmented and the ink is thick and wet (and can bleed) – but overall they are great portrait markers for the price, and will last a great deal of time if you clean and care for them correctly.