1. Check Your Device Model Before Choosing a Pin Count

The most important buying rule is simple: microneedling cartridges are not universal. Two tips may look similar in a product photo but use different diameters, locking tabs, bayonet systems or internal connections.

For example, the Dr. Pen M8 uses a different cartridge range from the M8S and A11. The M9 has its own cartridge system, while the H5 and H6 also use separate cartridge families. Never force a cartridge into a device that it was not designed to fit.

2. Understand What the Pin Count Means

The pin count tells you how many needles are arranged inside the cartridge. It does not tell you the treatment depth. Depth is controlled separately by the device setting and should always be used according to the product instructions and appropriate professional guidance.

In general, a lower pin count creates fewer, more widely spaced contact points, while a higher pin count creates a denser contact pattern. The way a cartridge feels and performs can also be influenced by the device speed, pressure, number of passes, treatment area and user technique.

9 to 16 Pin: Focused Contact

Lower-count cartridges are commonly selected when the user wants a more concentrated contact pattern or is working on a smaller, carefully selected area. Depending on the device, this category may include 9 Pin, 11 Pin, 12 Pin, 14 Pin or 16 Pin cartridges.

These options are not available for every Dr. Pen model, so compatibility should still be the first decision.

18 to 25 Pin: Balanced and Versatile

Mid-range cartridges offer a useful balance between focused contact and broader coverage. Options such as 18 Pin, 24 Pin and 25 Pin can be suitable for users who want a versatile cartridge configuration without moving to the highest pin density.

The Dr. Pen M9, for example, currently offers an 18 Pin option, while several other device families include 24 Pin cartridges.

36 Pin: Broad, Even Coverage

A 36 Pin cartridge uses a denser needle arrangement and is often chosen for broader, more evenly distributed contact across the selected cosmetic skincare area. It is one of the most widely available configurations across the Fynare cartridge range.

42 Pin: Highest-Density Needle Coverage

A 42 Pin cartridge provides a very dense contact pattern. It may appeal to users who prefer more contact points distributed across the cartridge surface. A higher pin count does not automatically mean a deeper or stronger session; depth and operating technique remain separate factors.

Nano-R and Nano-S: Surface-Level Cosmetic Skincare

Nano cartridges are different from traditional needle cartridges. Nano-style tips are designed for gentle surface-level cosmetic routines and topical product application rather than the same type of needle penetration provided by a microneedling cartridge.

• Nano-R: A round nano-style cartridge that follows the circular shape of the cartridge head.
• Nano-S: A square nano-style surface configuration available for selected models.

Nano-R and Nano-S should not be treated as universal alternatives. Check whether your specific device family offers one or both shapes.

3. Compare the Cartridge Options Available for Each Device

The table below summarizes the cartridge configurations currently listed on Fynare. Product selections can change, so review the options shown on the individual product page before ordering.

4. Choose Based on the Size of the Area

The size and shape of the selected area can help narrow your choice after compatibility has been confirmed.

• Smaller or more detailed areas: A lower or mid-range pin count may provide a more focused contact pattern.
• General facial areas: Mid-range options such as 18 Pin or 24 Pin offer a practical balance when available for your device.
• Broader areas: Higher-density options such as 36 Pin or 42 Pin distribute more contact points across the cartridge surface.
• Surface-level cosmetic application: Choose a compatible Nano-R or Nano-S cartridge rather than a needle cartridge.

Do not select a cartridge only because it has the largest or smallest number. The best option is the one that matches your device, intended cosmetic routine, experience level and product instructions.

5. Needle Count Is Not the Same as Needle Depth

This is one of the most common sources of confusion. A 42 Pin cartridge is not automatically deeper than a 12 Pin cartridge, and a 12 Pin cartridge is not automatically more suitable for every targeted concern.

Pin count describes the number and density of needles. Needle depth is adjusted separately on compatible devices. The actual skin response may also vary according to speed, pressure, pass count, skin condition and technique.

6. How to Choose in Five Steps

1. Identify your exact device.
   Read the full model name on the pen, original box or user manual.
2. Open the matching cartridge product page.
   Confirm that your model is specifically named in the compatibility information.
3. Choose needle or nano.
   Select a needle cartridge for a microneedling configuration or a nano cartridge for a gentle surface-level cosmetic routine.
4. Select the contact density.
   Choose a lower count for more focused contact, a mid-range count for versatility or a higher count for denser coverage.
5. Choose the pack size.
   Remember that every cartridge is single use, so select a quantity that fits your expected routine without planning to reuse cartridges.

7. Cartridge Hygiene and Safety Checklist

Cartridge choice is only one part of a responsible routine. Hygienic handling is essential whenever a product contains needles or comes into close contact with the skin.

• Use one new, individually sealed cartridge for each session.
• Do not reuse, wash or attempt to re-sterilize a used cartridge.
• Never share a cartridge with another person.
• Do not use a cartridge if the package is open, torn, wet or damaged.
• Do not touch the needle or nano surface before installation.
• Turn off the device before attaching or removing the cartridge.
• Follow the complete instructions supplied with your device.
• Do not use on injured, infected, irritated or actively inflamed skin.
• Seek advice from a qualified healthcare or skincare professional when you are unsure whether microneedling is appropriate for you.

Microneedling products should be used only for their labeled cosmetic purpose. A cartridge does not diagnose, treat, cure or prevent disease, and individual experiences can vary.

8. Common Cartridge Buying Mistakes

Buying by Appearance Alone

Cartridges from different product generations can look nearly identical. The connection system matters more than the color or general shape.

Assuming All “M Series” Cartridges Fit

The M8, M8S and M9 do not all use the same cartridge family. Always check the exact model number.

Confusing Nano Tips with Needle Cartridges

Nano tips are intended for surface-level cosmetic routines. They do not provide the same type of contact as cartridges containing traditional needles.

Choosing the Highest Pin Count by Default

More pins simply means a denser arrangement. It does not automatically make the cartridge better for every area, device or user.

Planning to Reuse a Cartridge

Microneedling cartridges are disposable. Cleaning a used cartridge does not make it suitable for reuse.

Final Recommendation

The best microneedling cartridge is not simply the option with the most needles. Begin with exact device compatibility, decide whether you need a needle or nano-style cartridge, and then choose the pin density that best matches the size and style of your cosmetic skincare routine.

When in doubt, choose carefully rather than forcing a similar-looking cartridge into your device. Correct compatibility, single-use hygiene and proper operating instructions matter more than any individual pin-count number.