12Pins Facial Skin Lifting Mesotherapy 10-UNI spa-1101 pack of 10 units The 12 pin Dermapen cartridges are used to treat more complex and severe skin concerns, such as deep scars caused by acne or surgery, as well as stretch marks in different areas of the body. These cartridges allow for deeper penetration into the skin, activating the cellular regeneration process and significantly improving the skins appearance.