Before you choose
Start with the coverage you want
Different pin counts change the area covered and how concentrated the contact feels. Use the guide below to compare the options, then confirm the product page matches your pen.
Compare the needle options
How are the needle options different?
Lower pin options feel more concentrated, while higher pin options cover a wider area. Nano is a separate surface-only cartridge style.
Choose by coverage
What changes when the number changes
Pin count changes how concentrated or distributed the cartridge contact feels. Fewer pins feel more focused; more pins cover a wider area at once. Compare the option that best suits the area you are choosing for.
A practical comparison
Compare the feel and coverage
Pin count changes how concentrated or distributed the contact feels. These descriptions are general shopping guidance, and individual experience may vary.
Focused · 9 / 12 pins
A more concentrated contact pattern for smaller areas.
Balanced · 16 / 18 or 24 pins
Options that sit between focused detail and wider coverage.
Wider area · 36 or 42 pins
A wider contact pattern for comparing broader coverage.
Nano · surface-only contact
A separate surface-focused cartridge style for a light, even contact pattern.
Check your model before ordering
Two cartridges can use the same pin count but appear on different product pages. Choose the option shown for your pen.
A closer look at your cartridge
Cartridge styles can look similar at first glance. Use the guide below to compare pin counts and Nano options, then confirm the product page matches your pen.
Match your model, then compare pins
Find the right cartridge for your model
Start with the model name printed on your pen, then compare the compatible pin counts and Nano options below.
| Device model | Compatible pin counts | Nano options | What to check |
|---|---|---|---|
| M8 / M7S | 11, 16, 24, 36, 42 | Round, 3D, 5D, Silicone | Same options listed for M8 and M7S |
| M8S / A8S / A9 / A11 / A20 | 12, 18, 24, 36, 42 | Round, 3D, 5D, Silicone | Check the exact product title |
| M9 | 18, 36, 42 | Round | Smart-chip cartridge only |
| M5 / M7 | 9, 12, 24, 36, 42 | Round, 3D, 5D | Same options listed for M5 and M7 |
| A6S | 11, 16, 24, 36, 42 | Round, 3D Square, 5D Square | A6S-specific fit |
| A10 | 12, 24, 36, 42 | Round | Match A10 packaging |
| A7 | 12, 24, 36, 42 | Round | Match A7 packaging |
| A6 | 12, 36, 42 | Round | Not interchangeable with A6S |
| A1 | 9, 12, 24, 36, 42 | Round, 3D, 5D | Match A1 packaging |
Availability can change. Always use the compatibility wording on the current product page as the final reference.
Before you order
A few calm checks can prevent the wrong fit
No model-by-model photo library is required. The model name, product title and connector shape give you the clearest answer.
Read the model label
Look at the name printed on the pen body or original box—not only its colour.
Match the product title
Choose a listing that names your exact Dr. Pen model.
Compare the connector
If you still have an old cartridge, compare its base and locking tabs before ordering.
Keep packaging sealed
Confirm the fit first. Individually sealed cartridges should remain unopened until use.
Good to know
A little care goes a long way
Cartridges are individually packaged for single use. Keep the package sealed until you have confirmed the correct fit.
Single use only
Keep sealed
Never force the fit
Contact us if unsure
Cartridge guide FAQ
Questions, answered gently.
Do all Dr. Pen cartridges fit every device?
No. Several models share similar-looking cartridges, but the connector and cartridge family must match your pen.
Does a higher pin count mean a better cartridge?
Not automatically. Pin count mainly changes coverage and how concentrated the contact feels. The best choice depends on the area and your preference.
What is a Nano cartridge?
Nano cartridges use a textured surface rather than traditional needle pins. They are generally compared for gentle surface contact and skincare application.
What should I do if my model is not listed?
Check the exact model printed on your device and contact support before opening the cartridge package.
Ready when you are
Shop cartridges by device model
Begin with compatibility, then choose the pin count that makes sense for you.