Add color to almost any writing project with the Marvy Uchida Le Pen Dark Set. 10 vibrant colors in a re-usable plastic storage case. The case opens to create a stand for your Le Pens for easy access and storage while using. Le Pen has water based ink that dries quickly and is smear resistant, works great on most thinner papers, matches the color of the barrel, Great for journals, planners and all of your writing needs. Le Pens synthetic extra fine tip delivers a smooth, consistent solid line of color