With the Faber-Castell Artist Pen sepia 4-piece set, you receive four pens in sizes S, F, M, and B, allowing you to create unique ink drawings. Particularly noteworthy are their expressive quality, aging and lightfastness, as well as the many combination possibilities with other painting techniques. The artist ink in a convenient disposable pen is very pleasant to use and easy to apply. The ink is waterproof, odorless, acid-free, and pH-neutral. The pens are excellent for sketches, drawings, illustrations, and more.