For distributors and tattoo studio buyers, comparing tattoo cartridge needles is most useful when each model is checked against the same specification fields. The supplied product records list overlapping materials, dimensions, configurations, membrane features, sterilization, and packaging for SP5, HM3, and HM6. They do not establish a performance ranking or explain a technical difference between the three models. Buyers should therefore compare the documented specification first, then verify the exact SKU and acceptance criteria with the supplier.

Suzhou Creditech Electronic Technology Co., Ltd. designs and manufactures tattoo cartridge needles and PMU cartridges. This article uses the product specifications supplied for CREDITECH MED’s SP5, HM3, and HM6 records as a buyer-reference framework; it does not treat the models as independently tested or claim that one outperforms another.

Start with what the three model records actually establish

The supplied SP5, HM3, and HM6 product records identify each as a tattoo needle cartridge and list the same core specification set: medical-grade stainless steel needles, medical-grade PC housing, silicone anti-backflow membrane, needle diameters from 0.15mm to 0.35mm, taper lengths from 1.5mm to 7mm with an extra-long taper option, and configurations including RL, RS, RM, Magnum, and Flat. The listed records also specify a precision tolerance of ±0.02–0.05mm, EO gas sterilization, sterile breathable film packaging, compatibility with rotary tattoo machines, low-vibration design, and stable controlled ink delivery.

That shared specification set is a useful screening baseline, but it is not proof that every selectable configuration is available in every model, or that the products are identical in dimensions not listed. The source records do not provide a model-by-model test report, needle count matrix, SKU-level drawing, comparative performance result, MOQ, price, lead time, or product-specific certification dossier. A buyer should not infer those details from the shared fields.

Side-by-side specification checklist

The table reflects the supplied model records. Shared listed specifications should not be read as independent verification or as a guarantee that every size, taper, and configuration can be ordered in every model.

How to use the checklist for studio and distributor decisions

1. Build the comparison around intended use

For a studio, the first filter is the work the cartridge is expected to support. The supplied product information names fine-line tattooing, traditional tattooing, lining, shading, color packing, PMU eyebrow work, and SMP among the product types or application areas. These categories help define the questions to ask, but the specification record does not assign a unique application advantage to SP5, HM3, or HM6. A studio buyer should therefore identify the required configuration, diameter, and taper for each intended task, then ask the supplier to confirm the matching model and SKU.

For distributors, the same framework can be used to structure a range without assuming that model names alone indicate a different technical tier. Record each requested combination—such as configuration, diameter, and taper—against its product code and packaging description. If the supplier cannot map a requested combination to a specific SKU, the assortment plan remains incomplete.

2. Treat tolerance as a question to define, not a stand-alone ranking

The supplied records give a precision tolerance of ±0.02–0.05mm for the listed models. The range is useful for screening, but a buyer needs to know what dimension it applies to, whether it varies by configuration, and how compliance is measured. Without that definition and an inspection method, the tolerance cannot support a meaningful model-to-model performance ranking.

Ask for the controlled drawing or specification sheet for the ordered configuration, the applicable measurement point, and the acceptance method used for incoming or production inspection. If a sample is approved, preserve its SKU and specification revision so later shipments can be checked against the same reference.

3. Evaluate membrane and ink delivery as documented features

All three supplied records list a silicone anti-backflow membrane and stable controlled ink delivery. These are product-feature statements, not comparative test results. The materials provided do not include leakage rates, fluid-flow measurements, test conditions, or evidence that one model performs differently from another.

For qualification, buyers can ask the supplier to identify the membrane construction in the product drawing, explain how the feature is inspected, and provide any available product-specific validation documents. During sample evaluation, define observable acceptance criteria in advance—for example, the sample configuration and the buyer’s own functional checks—rather than relying on an undefined claim of “stable” delivery.

4. Match the package and sterilization evidence to the delivered lot

EO gas sterilization and sterile breathable film packaging are listed for the products. A purchasing checklist should distinguish these stated product attributes from the evidence needed to accept a particular delivery. Ask for the documents that identify the product and batch, describe the sterilization status, and support the packaging and release information supplied with the goods. Verify the package is intact and that the labeling corresponds to the purchase order and product specification.

The available records do not provide EO cycle details, sterilization validation, residual results, shelf-life data, or packaging-integrity test results. Those matters should be treated as document requests, not assumed from the words “EO sterilized” or “sterile packaging.”

Certification and document checks: request evidence, verify scope

Certification references should be handled as a document-review exercise. The product records provided here support EO gas sterilization and sterile breathable film packaging as listed features. They do not establish that SP5, HM3, or HM6 holds a particular FDA, CE MDR, or ROHS status, nor do they include an MSDS or test report for the regulatory references named in the purchasing brief. Do not present those items as confirmed product certifications without examining the relevant documents.

• EO gas sterilization: Ask for product- and batch-relevant sterilization documentation and confirm the product identity and lot information match the shipment. The supplied product specifications state EO gas sterilization; they do not include validation or batch-release records.
• Sterile breathable film packaging: Confirm packaging description, product labeling, and the records available for the specific SKU and batch. Request evidence supporting any packaging-integrity or shelf-life claims rather than assuming them.
• FDA 21CFR175.300, 21CFR180.22, and ASTM C738-94: If these references are requested in a buyer’s checklist, ask the supplier to identify the exact material or component covered, the applicable test or declaration, its issuer, and the intended regulatory context. The supplied corpus does not verify applicability or compliance for these references.
• CE MDR and ROHS 2.0: Request the document itself and check the named legal entity, product or model scope, document status, and relevant market. The product specifications supplied here do not establish CE MDR or ROHS 2.0 status for any of the three models.
• MSDS: Ask which material or substance the document covers and whether it matches the supplied product or packaging. An MSDS is a document to review, not by itself proof of product certification or sterile status.

For each document, compare the manufacturer or legal entity, model or product family, scope, issue and validity details where applicable, and any referenced test sample against the purchase order. If the document is not product-specific, ask the supplier to explain its scope before using it as an acceptance basis.

Purchasing terms and acceptance criteria to agree before ordering

The supplied data does not state price, minimum order quantity, lead time, payment terms, or model-specific availability. These should be obtained in a written quotation rather than inferred from product specifications. For OEM or private-label orders, record the approved product version and packaging artwork as separate controlled items.

These questions turn a model-name comparison into a traceable procurement record. A buyer can approve a sample against a written specification, then use that same specification to inspect subsequent shipments. This is particularly useful when a distributor is managing multiple diameters and configurations, or when a studio needs a repeatable replenishment standard.

What this comparison can—and cannot—say

On the supplied specifications, SP5, HM3, and HM6 share the listed materials, diameter and taper ranges, configurations, membrane feature, tolerance, sterilization method, packaging type, and rotary-machine compatibility. The product record for SP5 additionally classifies it as a Fine Line and Traditional Tattoo Cartridge Needle; the supplied customer-facing HM3 description identifies it as a Fine Line Tattoo Cartridge Needle. The HM6 product record lists Fine Line, Traditional, shading, color-packing, PMU eyebrow, SMP, long-taper, and soft-edge Magnum types. Those classifications should be confirmed against the exact SKU being considered.

The available evidence does not establish that one model is more precise, quieter, safer, more durable, or better suited to a specific task than the others. It also does not establish a verified advantage over traditional bar needles; the supplied material is a specification comparison among cartridge models, not a controlled comparison between cartridge and bar systems. That boundary matters: buyers can use the shared specifications to shortlist and request evidence, but should not convert them into an unsupported ranking.

FAQ

Are SP5, HM3, and HM6 listed with the same main specifications?

The supplied product records list the same core materials, diameter and taper ranges, configurations, tolerance, membrane feature, EO gas sterilization, sterile breathable film packaging, and rotary-machine compatibility. The records do not show whether every option is available under every model or establish that the models are otherwise identical.

Which model is best for fine-line, PMU, or SMP work?

The supplied data does not provide comparative test results or prove that one model is best for a particular application. The records list fine-line categories and identify PMU and SMP product types in the model range. Confirm the exact configuration, diameter, taper, SKU, and sample performance for the intended use.

What does the ±0.02–0.05mm precision tolerance refer to?

The supplied specifications state a tolerance of ±0.02–0.05mm but do not identify the measured dimension or inspection method. Buyers should request the technical drawing, measurement basis, and acceptance procedure before using the tolerance as a purchasing criterion.

Do the supplied specifications verify FDA, CE MDR, or ROHS 2.0 status?

No. The supplied product records specify EO gas sterilization and sterile breathable film packaging, but they do not include evidence confirming FDA, CE MDR, or ROHS 2.0 status for SP5, HM3, or HM6. Ask for the relevant documents and verify their scope and product applicability.

What should be agreed before accepting a production order?

Record the exact model and SKU, configuration, diameter, taper, materials, tolerance definition, sterilization and packaging documents, labeling, and sample acceptance criteria. Obtain commercial terms—including MOQ, price basis, lead time, and payment terms—in the supplier’s written quotation.

Buyer takeaway

Use the SP5–HM3–HM6 comparison as a specification checklist, not a performance ranking. The product records provide a clear shared baseline; the remaining procurement work is to confirm SKU-level availability, define acceptance measurements, review product- and batch-relevant documents, and agree commercial terms in writing. That approach keeps the comparison useful for studios and distributors while separating listed features from evidence that still needs to be requested and checked.