What a SkinPen cartridge is

A SkinPen cartridge is the sterile, single-use component that mounts on the reusable motorized handpiece and carries the needles that do the work. The FDA De Novo decision summary describes the system as a microneedling pen handpiece plus a sterile needle cartridge, with the motor driving the needles at a single continuous speed of 7,000 RPM. The cartridge is the part a clinic reorders; the handpiece is kept and reused with a barrier sleeve called the BioSheath. For a practice, the cartridge is both the main running cost and the part where sterility and compatibility have to be right.

Single-use, sterile, and tracked

The cartridge is a sterile, single-use part. The FDA record states it is sterilized with ethylene oxide to a sterility assurance level of 10-6, and the GUDID device record lists it as single-use and lot tracked. The handpiece, by contrast, is reusable, supplied non-sterile, and serially tracked. That split is the practical core of SkinPen consumables: a disposable sterile cartridge per treatment, a durable handpiece that is cleaned and reused.

The cartridge also carries a reuse protection feature. The FDA summary describes a built-in lockout that prevents a cartridge from being detached and reattached, so a used cartridge cannot be run a second time. That is a sterility and cross-contamination control, not a sales mechanism, and it is one reason cartridge sourcing should match genuine single-use parts rather than refilled or re-run units.

Needle configuration and depth

The FDA De Novo record confirms that the cartridge offers 11 depth settings from 0 to 2.5 mm in 0.25 mm increments, and that the needles are stainless steel with an inner and outer needle arrangement. The widely cited figure of 14 needles per cartridge comes from manufacturer documentation rather than the FDA record, so a clinic should treat the count as a manufacturer specification; the needle gauge is not published in the records available, so it should not be stated as fact.

One depth detail is important for protocol and for honest patient discussion. While the device can be set up to 2.5 mm, the FDA summary states that safety and effectiveness for settings greater than 1.5 mm have not been evaluated, and the labeling carries that precaution. The cleared indication itself is specific: improving the appearance of facial acne scars in adults aged 22 or older. How depth maps to that indication, including the recommended procedure depths in the FDA labeling, is set out in the guide to needle depth settings per protocol.

BioSheath and cross-contamination control

The BioSheath is a separate accessory from the cartridge. The FDA De Novo summary describes it as a nonsterile, single-use disposable cover that fits over the microneedling pen handpiece to avoid contamination. It is a barrier sleeve, not a sterile field, and that wording matters: its job is to keep blood and tissue generated during treatment from reaching the reusable handpiece, working alongside the cartridge's own fluid-ingress barrier. The FDA review notes that in simulated use no organisms were detected beyond the cartridge barrier, and the BioSheath was tested to maintain an effective barrier to test soil.

For a clinic, the takeaway is that infection control on SkinPen depends on two single-use parts used together: a sterile cartridge and a nonsterile BioSheath barrier, both replaced each treatment. Reusing either defeats the design.

Precision and Elite cartridges are not interchangeable

SkinPen cartridges are specific to their device generation. The original SkinPen Precision uses one cartridge unit, and the newer SkinPen Precision Elite uses a different one, and the two are not cross-compatible. A clinic running both, or buying a used unit, needs to match cartridges to the exact handpiece in service. The device-side detail, including how to confirm which generation a unit is, sits in the guide to cartridge compatibility across SkinPen generations, and the system as a whole is covered in the SkinPen overview.

Sourcing SkinPen cartridges

Because the cartridge is single-use, it is the consumable that sets the running cost of a SkinPen practice, and the part where authenticity and compatibility carry the most risk. Pinova carries professionally sourced SkinPen cartridges; compatibility is based on industry-standard usage and clinical experience, and clinics should verify any cartridge against their specific handpiece and generation before ordering. The clearance behind the device, including why it was the first microneedling system authorized by the FDA, is covered in the article on SkinPen's FDA clearance. Current stock is listed under SkinPen treatment kits.

Frequently asked questions

How many needles does a SkinPen cartridge have?

Manufacturer documentation commonly states 14 stainless-steel needles. The FDA De Novo record confirms the cartridge uses stainless-steel inner and outer needles but does not publish a count, so the figure should be treated as a manufacturer specification.

Are SkinPen cartridges single-use?

Yes. The FDA record lists the cartridge as sterile and single-use, sterilized with ethylene oxide, and it includes a reuse protection lockout that prevents a cartridge from being detached and reattached for a second use.

What is the BioSheath, and is it sterile?

The BioSheath is a nonsterile, single-use barrier sleeve that covers the reusable handpiece to limit cross-contamination. It is a contamination barrier rather than a sterile field, and it is used together with the sterile cartridge on each treatment.

Are SkinPen Precision and Elite cartridges interchangeable?

No. The Precision and Precision Elite generations use different cartridge units and are not cross-compatible. Match cartridges to the specific handpiece in service.