Copic Sketch Markers offer a stunning palette of colors, including a wide range of gray tones. The alcohol based ink is permanent and non-toxic, and dries Acid-Free. The replaceable Super Brush nib acts like a paintbrush in both feel and application. Packaged in a clear plastic case, a Copic Sketch set is the ideal way to begin or add to your marker collection. Choosing colors has never been so simple.