Copic Marker Cool Grey Set 12 contains Copic grey markers in 11 cool grey shades and 1 black Copic Marker. Copic Markers are a versatile, double-ended marker with an alcohol based ink which dries acid-free. They are non-toxic and ideal for drawing, rendering and Architectural design. Copic Markers are refillable and nibs can be replaced. Copic Marker Sets come in a hard acrylic case that enables easy access when using. Copic Markers can be used with the Copic Airbrush System. The broad nib offers coverage over larger areas and the fine nib is suited to more detailed work. The Copic Original range enhances fine art projects, calligraphy and more!