The Koi Coloring Brush Pens by Sakura are the perfect way to add vibrant color to your sketches, journaling, cartooning, illustrations or rubber stamping. These no-mess, dye-based pens perform like an artist brush and make fine, medium or bold brush strokes when you simply change the amount of pressure to the nib. These pens are odorless and water-based and are ideal for practicing your calligraphy and hand-lettering skills. The package includes six pens (dark green, red, brown, yellow, black, and dark blue).