10 pack of 16 needle Dr. Pen cartridges, compatible with the Dr. Pen A6S Microneedling Pen only. The needles are made of high-quality stainless steel and titanium. The 16-pin cartridge, unique to the Dr. Pen A6S, suits smaller areas and features the finest needle gauge, at 0.18mm thickness, which allows for a precise application to treat acne scarring. Each cartridge comes in a sterile pack.  Cartridges are single-use only. Ensure to use a new needle cartridge each time you microneedle. How does Microneedling with Dr. Pen work?  The needles create tiny microchannels on the surface of the skin. These tiny microchannels stimulate the skin’s healing response and increase the production of collagen and elastin. How to Use:  Important: Microneedling cartridges must be sterilized before each use to ensure the treatment is safe and hygienic. It is essential to follow these steps carefully to ensure that the microneedling cartridges are properly sterilized. Here are the steps to sterilize microneedling cartridges: First, ensure that you have all the necessary equipment for sterilization; gloves, isopropyl alcohol solution (70% or above) and a clean container to hold the solution. Put on your gloves to avoid contaminating the cartridges during the sterilization process. Check on your cartridge; ensure the needles are in perfect condition (i.e. not bending) and remove any debris. Pour enough alcohol solution into the container and dip the cartridge needle into a sterilization container, then soak for a couple of minutes. If you have alcohol solution in a spray model, you can spray it towards the needle head of the cartridge. Once the sterilization is complete, allow the cartridge to air dry before using it. Finally, your cartridge is ready for use.   What’s In the Box: 10 x 16 needle cartridges for the Dr. Pen A6S Microneedling Pen DO NOT USE On broken skin or open wounds On active acne or irritated skin Please refer to our instruction guide for the full list of contraindications  16-pin cartridges are not suitable for hair loss application Please speak with your doctor before purchasing any Dr. Pen products. The content on this site is not intended to substitute for the advice of a qualified physician, pharmacist, or other licensed health-care professional. The products may have additional information and instructions on or inside the packaging that you should carefully read and follow. Contact your health-care provider immediately if you suspect that you have a medical problem. This product may not have been evaluated by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease or health condition. For any concerns or questions, please contact your GP or dermatologist.