Koi Coloring Brush Pens 6 Pack Assorted - Coloring your artwork is easy anywhere anytime with the no-mess dye-based Koi Coloring Brush pens. These pens perform similar to an artist brush. Make fine medium or bold brush strokes just by changing the amount of pressure to the nib. The durable tip will quickly spring back to its original shape. The odorless water-based solvent facilitates smooth blending and layering of colors. Koi Coloring Brushes are a convenient way to add vibrant color to any sketch journal cartoon illustration or rubber stamps. This package contains six 5-1/4 inch long watercolor brush pens in six different colors