skin marker: used in radiology research and doctor use, marking on patients’ skins before surgical and skin disease treatments! ink is nontoxic and nonirritant! clear and safe use on skins! regular color: violet nib size: 1.0 mm nib 0.8 mm/0.5 mm and other size can be offered by order production! attentions: 1. clean and dry the skin firstly, and then use the skin marker for drawing! 2. use iodine to disinfect the skin and fix markings! 3. use the dilute alcohol to remove the markings! 4. donot use a same marker with different person to avoid possible infection! 5. cautiously use on mucous membrane or wounded skins; please test with the patient who are sensitive to gentian violet！see www/kearing/com or info/kearing/com for requirements!