Tombow ABT PRO Dual Brush Pen 12 set, Grey ColoursMixed grey nuances from the Tombow ABT PRO colour chart in a pack of 12. The pens are alcohol based and have a soft brush tip in one end and a broad chisel tip on the other end. Perfect pens for all kinds of illustrations, sketches and drawings. We also sell the Tombow ABT PRO Dual Brush pens separately if you wish to complement your pack with more colours. You can see which colours are included in the image gallery or in the list further down on this