Thank you for viewing! This is a set of 36 knock-type water-based color pens. 12 standard colors 12 bright and light colors 12 mature, dark colors I bought these about two years ago, but I soon bought an iPad and hardly used them. I kept them, thinking I might use them someday. Because they are knock-type pens, you don't have to worry about losing the caps. I used some of the colors a few times and stored them with other stationery, so the case and pens have some minor stains, but I think they are in good condition. I'm looking for someone who will use them! *Please understand that the condition is based on a layman's assessment, usage, measurements, and that they will be shipped with simple packaging (compression).*