Your cartridge.
Your questions.
A clearer next step.

Match the exact model on your device with the model named on the cartridge listing. Start with the model matcher. A similar name or pin count is not proof of compatibility.

Cross-model K5 compatibility is not confirmed by the evidence used for this guide. Use the listing for your exact model or ask support to confirm the cartridge SKU in writing before ordering.

Do not assume so. These are different model names; the matcher keeps their product listings separate.

Choose cartridges made for M9. Our reviewed M9 listing is the 18-pin replacement pack (10 cartridges); open the M9 panel in the matcher for price and availability. Do not assume another model’s cartridge will fit.

Use the exact Hydra model listing. H3 and H6 are shown separately; a reservoir or similar-looking connector does not establish cross-compatibility. Follow the supplied instructions for fitting and reservoir handling.

The manufacturer lists 9, 14 and 25 pins for Q2. Our reviewed Q2 listing is the 25-pin replacement pack (5 cartridges). Other Bio Pen models are not automatically compatible. DrPenStore instruction guide →

There is no required 36 → 18 → 12 learning ladder. Compare the common-use categories, then the exact options for your device. A beginner does not need to buy every count. See how the options differ →

Nano is a separate tip category, not a needle count. Check the exact tip construction and intended use on the product label. Do not treat a Nano dial setting as equivalent to medical microneedling depth.

Pin count alone does not describe a cartridge. Geometry, tip design, settings and handling differ. Sensation cannot verify the actual treatment depth or effectiveness.

No. Use a fresh cartridge for every session and person. Cleaning does not make a used needle cartridge safe to reuse.

Plan a fresh cartridge for each session. Check whether the listing is a single cartridge or a multipack before ordering; do not build a stock plan around an unapproved treatment frequency.

Stop, switch off and check the exact model and fitting instructions. Do not force a connector or continue with a damaged or unstable cartridge. Ask product support if the problem remains.

Follow the security-label process for the exact device. Open the genuine Dr. Pen guide; ask support if the verification result is unclear.

Shopify displays prices for the current market and currency. Confirm the pack, variant and availability on the product page before ordering.

The reviewed A20 range includes 12, 14, 18, 24, 36 and 42-pin packs and Nano Square. These are product options, not treatment recommendations. Open A20 options to check the available listings in your market.

The reviewed A10 36-pin and Nano listings each name 10 cartridges. Check the exact pack and any selected variant on the product page before ordering. Open A10 options.

Yes. The A6S Nano 10-pack is listed with the 11, 16 and 36-pin packs and the A6S face and body combo packs. Open A6S options to see prices.

Each has 12, 18, 24, 36 and 42-pin packs plus a round Nano. The M8S also has 5-pack combos for face, face and body, body, hair growth and beard growth. Open your model in the cartridge finder to see prices.