Faber Castell PITT artist pens are artist-grade markers made with extremely lightfast india ink. They are waterproof, odorless, and pH-neutral. Truly one of the highest quality pens available. This set is great for mixed/wet media, journaling, field sketching, or any fine art project. Includes: Sky Blue, Indanthrene Blue, May Green, Chromium Green Opaque, Green Gold, and Indian Red