Pigmented India Ink in multiple nib sizes and 48 colors brings great versatility to pen-and-ink drawings requiring lots of intricate details. Pitt Artist Pens are great for sketching, journaling, cartooning, and drawing. The Superfine, Fine, Medium, and Brush nibs not only replace ink bottles — they're instantly available for work. The ink is waterproof, unsurpassably lightfast, acid-free, and pH-neutral. The nib size is prominently displayed on the end of the cap.