Read the packaging before you open a Dr Pen cartridge. The sealed pack usually gives you the fastest clues about model family, pin count, nano shape, quantity, and whether the cartridge matches the product page. Keep the sterile pack sealed while you check; once it is opened, exchanges and fit questions become harder.
Packaging checklist before opening
| Packaging detail | What to look for | Why it matters |
|---|---|---|
| Model family | M8, M8S, A6, A6S, A9, A20, H6, or another exact model name. | The model family decides fit before pin count or nano shape. |
| Tip style | A pin count such as 12, 16, 18, 24, 36, 42, or a nano label. | This tells you the cartridge type after model fit is confirmed. |
| Nano shape | Round nano or square nano if the pack is a nano option. | Round and square nano are separate product choices. |
| Quantity | Pack size such as 5 pack or 10 pack. | Quantity should match the product page and your order confirmation. |
| Sterile seal | A clean blister or sealed pack with no tears or crushing. | Do not use a cartridge from damaged sterile packaging. |
| Connector clue | Visible neck, collar, or locking shape if shown on the pack. | This helps catch wrong-model orders before opening. |
The model-first reading rule
Do not start with the pin count. Start with the model family. A 12 pin cartridge for one device family is not automatically a fit for another. If the model on the pack is unclear, compare the order with the Dr Pen compatibility chart before opening it.
How to compare packaging with the product page
| Product page field | Packaging match to confirm |
|---|---|
| Title | The same model family and tip style should appear on the pack or label. |
| Collection | The product should belong to the same model collection, such as M8S cartridges or A20 cartridges. |
| Photos | Connector shape, tip array, and pack labeling should look consistent. |
| Pack size | The quantity on the pack should match what you ordered. |
| Support notes | If the listing needs more context, compare the model in the compatibility chart and review the fit troubleshooting guide before opening the pack. |
When the pack and order do not match
- Do not open the sterile blister.
- Take a clear photo of the front label, model text, and connector side.
- Take a photo of the device label or old cartridge if you still have it.
- If support needs model confirmation, send the device label, unopened pack front, connector side, and order number.
- If the connector looks wrong, compare it with the fit troubleshooting guide before applying force.
Common packaging mistakes
- Reading only the pin count and missing the model family.
- Assuming a combo pack contains every cartridge type for every pen.
- Confusing round nano and square nano because both say nano.
- Throwing away the packaging before testing fit.
- Opening a pack after noticing the wrong model name.
Fast decision table
| What you see | Best next step |
|---|---|
| Model and tip style match the order | Keep the pack sealed until you are ready to install, then follow clean handling steps. |
| Pin count matches but model does not | Stop and use the compatibility chart. |
| Packaging is torn or crushed | Do not use the cartridge; document the issue. |
| Round nano vs square nano is unclear | Compare them in the round nano vs square nano guide. |
| The cartridge will not click in | Use the fit troubleshooting guide before applying force. |
Use only sterile, compatible cartridges. Do not reuse cartridges, do not share cartridges, and do not treat irritated, infected, sunburned, or broken skin. If you have a medical skin concern or are unsure whether a device is appropriate for you, ask a licensed professional before use.
Use packaging as the last pre-open check
Match model, tip style, quantity, and connector clues before the sterile pack is opened.
