m|devices Surgical Skin Marker Pens are a specific type of pen used to outline/mark the surgical incision site on the skin. The pen is latex free, non‐cytotoxic and has been tested for biological safety in compliance with ISO10993 for skin irritation and sensitization. The marking agent is based on gentian violet, a traditional marking agent which has wide tolerance within the population. Surgical Skin Marker Pens are available in regular and fine tip with ruler and labels.