No. M9 replacement cartridges are designed exclusively for the Dr.Pen M9 device. Each cartridge features an integrated smart chip that connects with the M9 to verify compatibility and automatically calibrate power output. Cartridges from other Dr.Pen models — such as the M8S, A6, or A9 — will not fit or function correctly with the M9. Always pair your device with cartridges made specifically for your model to ensure safe, consistent performance.

M9 cartridges are available in four configurations: 18-Pin for targeted, precision work on small or localized areas; 36-Pin for broad, even coverage across the full face or scalp; 42-Pin for maximum coverage on larger body areas; and Nano Round for superficial serum infusion without full needle penetration, ideal for sensitive skin or more frequent sessions. As a general guide, lower pin counts offer deeper, more focused results in specific zones, while higher pin counts provide a gentler, wider-coverage experience. If you are new to microneedling, the 36-Pin or Nano Round is a great starting point.

No — each M9 cartridge is designed for single use only. The ultra-fine 34-gauge stainless steel needles (0.18 mm diameter) bend microscopically after the first session, which reduces effectiveness and may cause unnecessary skin irritation in subsequent uses. Every cartridge arrives individually sealed and EO gas sterilized. Once used, it should be safely disposed of. Never share cartridges between individuals, as this creates a hygiene and safety risk.

Each cartridge should be replaced after every single session — one session equals one cartridge. For needle-based cartridges (18-Pin, 36-Pin, 42-Pin), most users allow 2 to 4 weeks between sessions for skin to recover fully. Nano Round cartridges support more frequent use, up to several times per week, as they do not penetrate deeply into the skin. If redness or sensitivity persists beyond 72 hours, extend the gap between sessions and consider consulting a skincare professional before continuing.

Each Dr.Pen M9 cartridge contains a built-in smart chip that communicates directly with the M9 device upon attachment. The chip allows the pen to automatically recognize the cartridge, confirm authenticity, and calibrate motor speed and power output for consistent, reliable performance. This system helps prevent the use of counterfeit or incompatible cartridges and protects both the device and your skin during each session. If the M9 does not recognize a newly attached cartridge, it is likely non-genuine or incompatible — always purchase cartridges from an authorized retailer.