A 6-pack with a selection of grey colors from the Sakura Koi Coloring Brush pen range.
The pens are water-based and have a soft flexible brush tip that can draw both wide and thin lines, by changing the pressure to the nib.  The durable nib quickly springs back to the original shape, stroke after stroke.
Compact pen lentgh (140mm).
The colors can be easily blended with each other or water for beautiful color transitions or watercolor effects.