Copic Markers are the original line of high quality illustrating tools, used for decades by professionals around the world. They are great for architectural design, product rendering, and other forms of industrial design. They are also popular among the hobby industry for use with models, ceramics and similar projects. Copic markers are compatible with the Airbrush system. They have nine nib options, are refillable and come in 214 (expandable to 322) colors. The characteristic square profile of the body is roll resistant on working surfaces, the body inscriptions are wear resistant, and the smooth polypropylene body gives you a comfortable grip. Each marker has a color-coded cap for instant color selection and is filled with alcohol-based ink for a long shelf life. It is the marker created for creative people!