Copic Sketch Markers are designed to be used as a marker to draw or color your designs onto your fly... but when combined with the Copic Airbrush Starter Kit, these markers become a highly effective airbrushing tool in your hands. Replaceable nibs Refillable ink Alcohol-based ink is permanent and non-toxic Dries acid-free Medium Broad nib for thick strokes Super Brush nib for variable-width strokes 3 nib options Easy-to-read color names and numbers Compatible with the Copic airbrush system *The color codes and names in the parentheses are the manufacturer's color codes and names.