The Winsor and Newton Promarker Blender can be used with all Promarker colours to create new shades and tones. The pen can be used as an under- layer or with wet ink. This creates a gradual change of shade or colour and delivers stunning results. It also helps create smooth coverage, eliminating potential felt marks. The blender is dual tipped with a broad chisel nib and fine bullet nib, so you can colour large areas and draw finer details. However you use it, the Promarker Blender is sure to improve the look of your Promarker pieces.