This cartridge uses a dense 42-pin needle layout, designed for intensive resurfacing across larger areas of the face or body. The higher needle density creates broader micro-channel coverage, making it suited to deeper concerns such as stretch marks, heavy wrinkles and significant scarring. Each cartridge includes a built-in smart chip that communicates with the Dr. Pen M9 device, and is individually sealed and EO gas sterilised for single use.

Benefits

• Helps improve the look of deep acne scars and uneven texture through dense, even stimulation
• Suited to treating stretch marks across larger areas of the body
• Helps target the appearance of visible spots and surface discolouration
• Supports softening the look of heavy wrinkles and deeper lines
• Higher needle density supports lifting and firming on larger treatment areas

Why You Would Use This

Choose the 42-pin cartridge when you are covering bigger areas or treating more pronounced concerns, such as stretch marks on the body or deeper wrinkles, where efficient, high coverage treatment matters more than fine detail.

How to Use Cartridges

Cartridges should be sterilised before each use to keep treatments safe and hygienic.

1. Gather gloves, a 70%+ isopropyl alcohol solution and a clean container.
2. Put on gloves before handling the cartridge.
3. Check the cartridge to make sure the needles are straight and free of debris.
4. Soak the needle tip in the alcohol solution for a couple of minutes, or spray it if using a spray solution.
5. Let the cartridge air dry fully before attaching it to the device.
6. Dispose of the cartridge safely after a single use.

Fitting the Cartridge

The Dr. Pen M9 cartridges contain sensitive electronic contacts, so it is worth aligning them carefully.

1. Find the alignment marker on the cartridge interface.
2. Match it with the corresponding indicator on the M9 device body.
3. Twist clockwise to lock it securely into place.

Avoid forcing the cartridge in. Incorrect installation can damage the electronic contact points.

Using the Dr. Pen M9

1. Double cleanse the skin and tie hair back away from the face.
2. Fit the cartridge as described above. The smart chip will validate and sync automatically.
3. Set your needle depth and speed using the smart controls on the device.
4. Apply a serum or booster to each area before needling so the pen glides smoothly.
5. Work each section with vertical, horizontal and diagonal passes, using light pressure.
6. Dispose of the cartridge safely once you are finished.