Features 1、Ink is non-toxic, environmental and harmless to skin without irritation, which is not easy to remove but won't remain on the skin forever 2、Ink particle is 5-10 um, which will not enter into the skin 3、Sterile pen is suitable for marking and positioning on the skin 4、Having tips at both ends, a regular tip and a ultra fine tip for detailed work 5、Disposable for single use only Specification Description: This skin marker pen is widely used in radiological research and treatment, surgical and skin care treatment to mark and position on patient's skin. Scale mark on the pen and a ruler can ensure accurate positioning and marking. Sterile, disposable and cap design is safe to use. Features: Ink is non-toxic, environmental and harmless to skin without irritation, which is not easy to remove but won't remain on the skin forever. Ink particle is 5-10 um, which will not enter into the skin. Sterile pen is suitable for marking and positioning on the skin. Having tips at both ends, a regular tip and a ultra fine tip for detailed work. Making clear mark fluently. Disposable for single use only. Specifications: Ink Main Ingredients: Gentian Violet Handle Material: PP Options: White Handle 1mm, White Handle 0.5mm, Double Ended Silver Handle, Double Ended White Handle Single Ended Pen Length: 16.5cm / 6.5inch Double Ended Pen Length: 14.5cm / 5.7inch Weight: 6-13g Type: Tattoo Accessory Function: Marking and Positioning on Skin Package Includes: 1 x Skin Marker Pen With Cap 1 x Ruler Notes: 1. Please test first for facial use and disinfect after marking, and the mark may remain a week. 2. Each pen is used only for a single person to avoid cross infection and not suitable to be used on wounded and mucosa skin. 3. Please test on your skin first then on customer's skin if you want to apply iodine after marking for enhanced and sterilized purpose, and remove mark with 70% medical isopropanol wet wipe or low concentration alcohol. 4. Please don't apply other liquid when the mark is not dry to avoid wipe away mark. 5. Please cleanse the skin before positioning to avoid greasy and dirty skin to block the pen tip. 6. Please swing the pen gently and mark on the paper then on skin if the pen has become wet. 7. It can't mark if the skin is not dry.