It comes in two sizes: 13 mm standard and 10 mm slim

or adding subtle gradients

The pens are filled with black permanent pigment ink that is acid-free

allowing you to refine your lines and correct details with ease

ensuring long-lasting color vibrancy in your artwork

tombow abt pro dual brush pen 12 set basic colours Painting on stones It comes in two sizes:Mixed base colours 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