The Copic Sketch marker offers outstanding performance in all areas of design and illustration. Two versatile tips produce a range of strokes from fine lines to wide color fills. The roll-proof flat barrel is filled with alcohol based ink for a long life. This set contains six Sketch Markers, including 100S Black, B29S Ultramarine, E29S Burnt Umber, G28S Ocean Green, R27S Cadmium Red, and Y15S Cadmium Yellow.