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: Bullet nib 1.5 mm, B = brush tip, C = Calligraphy nib color 101 white, S = 0.3 mm color 199 black-#167151