Application: Replace the needle as needed. Needle length is adjustable to suit different treatment areas. Ideal for treating smaller or more delicate areas such as around the nose, eyes, or mouth. Features: Item: Derma Pen M8 Needles Needle Type: 11, 16, 24, 36, 42, Round Nano, 5D Quantity: 10 or 20 pieces (needles only, does not include box or device) Electronic automated micro-needle device with adjustable needle depth settings. Designed for hygiene, convenience, and safety. Dr. Pen M8 uses a specialized cartridge with an arc edge for improved skin contact and smoother operation. These replacement cartridges are compatible only with the Dr. Pen M8 device. Advantages: 1. Minimizes epidermal damage 2. Reduced discomfort and redness due to high-speed vertical penetration 3. Easy to use on small or contoured areas 4. Disposable needles for single use 5. Faster and more efficient than manual micro-needling 6. Noticeable treatment results 7. Short recovery time 8. No permanent damage or injury when used as directed 9. No bruising, infection, or discoloration when proper hygiene is followed 10. Enhances absorption of topical skincare ingredients 11. Suitable for most skin types 12. Promotes dermal thickening without damaging the epidermis