Copic Sketch markers are double-ended refillable markers with low-odor, fast-drying, permanent, non-toxic alcohol-based ink. The Sketch marker features a flexible Super Brush nib on one end (for easy detail work) and a Medium Broad nib on the other end (consistent coverage for larger areas). The unique design offers a more comfortable grip fit into a special airbrush system and easily interchangeable nibs. The vast range of colours can be blended together, or layered on top of each other. As the markers are alcohol-based they are fast drying and will not smear. Ideal for graphic arts, fine arts, craft and calligraphy.