Round Magnum Tattoo Cartridges for Smooth Shading & Large Coverage

R&G Bio manufactures round magnum tattoo cartridges for shops, distributors and permanent makeup artists worldwide — built for soft shading, smooth gradients and controlled blending.

The curved needle arrangement follows the natural contour of the skin, laying down soft, even shading over large areas with less trauma than a flat magnum — comfortable for the client, consistent for the artist.

Every cartridge is EO gas sterilized, batch-coded for full traceability, and produced in ISO Class 7 cleanrooms under an ISO 13485 quality system. Review our certifications and compliance documents and see how we manufacture before you place a bulk order.

We support full OEM/ODM programs — housing colors, private labeling and custom packaging built around your brand, with factory-direct MOQs and tiered wholesale pricing.

FDA Registered CE-RoHS ISO 13485 Sterile EO
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  • Curved Arch Grouping
  • Soft Even Blends
  • Large-Area Coverage
  • EO Sterilized
  • OEM/ODM Ready

Model Reference

1
For example – 1005RM

10 – Needle Diameter (Gauge)
05 – Needle Count
RM – Needle Configuration

2
Needle Diameter (Gauge)

10 = #10 (Standard, approx. 0.30 mm)
12 = #12 (Standard, approx. 0.35 mm)

3
Needle Count

01 / 03 / 05 / 07 / 09 / 11 / 13 / 14 / 15 / 17 / 18 / 23 / 27

4
Needle Type

RL = Round Liner
RS = Round Shader
M1 = Magnum (Double Stack)
RM = Round Magnum
CM = Curved Magnum
F = Flat Shader
RLT = Textured Round Liner
TRL = Turbo Round Liner
STL = Super Tight Liner

#10 SERIES · 0.30MM STANDARD — THE SMOOTHEST, GENTLEST BLENDS

MODEL

GAUGE

TAPER

NEEDLE COUNT

MEMBRANE

STERILIZATION

FIT

TYPICAL USE

1005RM

#10 · 0.30mm

Medium 3.5mm

5

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Detail magnum shading, small soft blends

1007RM

#10 · 0.30mm

Medium 3.5mm

7

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Soft shading on small-to-medium areas

1009RM

#10 · 0.30mm

Medium 3.5mm

9

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Smooth gradients, portrait shading

1011RM

#10 · 0.30mm

Medium 3.5mm

11

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Medium-area black & grey blends

1013RM

#10 · 0.30mm

Medium 3.5mm

13

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Larger soft shading, realism work

1015RM

#10 · 0.30mm

Medium 3.5mm

15

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Big-area smooth shading, soft fades

1017RM

#10 · 0.30mm

Medium 3.5mm

17

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Heavy soft coverage, backgrounds

1023RM

#10 · 0.30mm

Medium 3.5mm

23

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Very large soft shading areas

1027RM

#10 · 0.30mm

Medium 3.5mm

27

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

The widest RM — maximum soft magnum coverage

#12 SERIES · 0.35MM STANDARD — FASTER SATURATION WITH A SOFT EDGE

MODEL

GAUGE

TAPER

NEEDLE COUNT

MEMBRANE

STERILIZATION

FIT

TYPICAL USE

1205RM

#12 · 0.35mm

Medium 3.5mm

5

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Detail shading with stronger deposit

1207RM

#12 · 0.35mm

Medium 3.5mm

7

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Everyday soft shading and blends

1209RM

#12 · 0.35mm

Medium 3.5mm

9

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Solid smooth shading on medium areas

1211RM

#12 · 0.35mm

Medium 3.5mm

11

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Fast black & grey coverage

1213RM

#12 · 0.35mm

Medium 3.5mm

13

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Large soft shading, fast gradients

1215RM

#12 · 0.35mm

Medium 3.5mm

15

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Heavy soft coverage, sleeve work

1223RM

#12 · 0.35mm

Medium 3.5mm

23

Yes, built-in

EO Gas · ISO 11135

Universal cartridge grip

Maximum coverage for large-scale shading

Built Like a Medical Device, Priced for Wholesale

The arch is the whole product: bend it wrong and the soft edge disappears. We control every step in our own factory, from needle grinding to sterile packing.

01 Precision-Curved Arch Grouping

RM needles sit in two rows bent into a smooth arch, so the corner needles ride shallower than the center. We form and solder the arch by machine, keeping the curve identical across the batch — that curve is what makes fills fade out with no hard borders.

02 Safety Membrane System

A medical-grade silicone membrane sits inside every cartridge. It keeps needle tension steady through long shading sessions and stops ink and body fluids from flowing back into the grip and machine.

03 Polished 304 Needle Tips

We use Japanese-imported 304 surgical steel with mirror-polished tips. Smooth, sharp points mean clean penetration and less friction in the skin. Each grouping is soldered by machine, so the recessed center is identical across every batch.

01 Medical-Grade Housing

The shell is medical-grade polymer with a wide clear tip matched to the curved footprint, so artists see the full ink load at the working point. The standard fitting works with most rotary machines and cartridge grips.

02 EO Gas Sterilization

Every cartridge is sealed in its own blister pack and sterilized with EO gas. Our sterilization process is validated under ISO 11135, with batch records kept for full traceability.

03 Two-Stage Quality Control

Every unit passes 100% visual inspection on the line. Then 30% of each batch is checked again under 100x microscopy for tip alignment, solder quality, and center-channel depth.

Why the Arch Decides the Blend

A flat magnum presses every needle to the same depth, so the fill ends with a hard edge. Bend the rows into an arch and the corner needles touch the skin more gently — the fill fades out on its own. That is why round magnums blend so well on black & grey and realism work, and why they follow body contours — arms, shoulders, ribs — without skipping. But the trick only works if the arch is symmetrical: a lopsided curve shades darker on one side. That is why our QC checks arch symmetry under 100x magnification on every batch.

Where Turbo Liners Work Best

One job: bold, saturated lines at higher speed. If the style is outline-driven and time matters, this is the needle.

Portraits & Realism

Skin tones live and die by soft transitions. 9RM to 13RM in #10 build smooth, mark-free gradients that flat magnums struggle to match.

Black & Grey Backgrounds

Smoke, clouds, soft background fills — the wide arch covers big areas with an even tone and leaves no visible needle lines.

Body Contours

Arms, shoulders, ribs, thighs — the curved footprint follows the body’s curves instead of fighting them. Less skipping, less catching, fewer passes.

Soft Color Blending

Petal fades, watercolor transitions, soft realism color — the arch lays color down gradually, so blends look airbrushed instead of striped.

Small Number, Detail Blends. Big Number, Soft Coverage.

Needle count sets the shading width. Gauge sets how fast the tone builds. Match both to the area.

5RM – 7RM

Detail shading, small soft blends

9RM – 11RM

Portraits, everyday gradients

13RM – 15RM

Large fades, sleeve backgrounds

17RM – 27RM

Maximum soft coverage

Round Magnum (RM) vs Round Shader (RS)

Both have “round” in the name — and both shade. The difference is scale: a small circle of needles versus a wide arched row.

ROUND MAGNUM (RM)

ROUND SHADER (RS)

Needle Layout

Two rows bent into a wide arch

Loose circle of needles

Footprint

Wide and curved — follows body contours

Small and round — fits tight spots

Coverage Speed

Fast on medium-to-large areas

Slower — built for control

Fill Edges

Soft, fades out naturally

Soft, but on a much smaller scale

Common Sizes

5RM – 27RM

3RS – 18RS

Best For

Portraits, black & grey, realism, soft color blends, backgrounds

Detail shading, small blends, stipple, contours and tight areas

Classic Mistake

Shading a small face detail with a 15RM — blows out the detail

Filling a sleeve background with a 7RS — slow and patchy

Compare with the rest of the shading catalog: Round Shader (RS) cartridges, Magnum (M1) cartridges, and Curved Magnum (CM) cartridges. For outlines, see Round Liner (RL) cartridges.

Our Certifications

R&G Bio is an integrated manufacturer with verified FDA registration, ISO 13485 / ISO 9001 certification and EU RoHS compliance — the documentation your market actually requires.

U.S. FDA RegisteredEstablishment No. 3009392898 CE — RoHS VerifiedEU 2011/65/EU Compliant ISO 13485:2016Medical Device QMS Sterile · EO GasSingle-use, batch traceable
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  • CE Rohs
  • FDA
  • ISO 9001
  • ISO 13485
  • Verified quality system — ISO 13485 / ISO 9001 certified factory, fully batch-traceable
  • Global market access — U.S. FDA registered, EU RoHS verified documentation
  • Custom certification support — if your market requires additional qualifications, we can assist in obtaining the relevant certifications. Contact us to discuss your requirements

Wholesale & OEM Programs

Factory-direct supply with full batch traceability. Tell us your sizes and target volume — we reply within 12 hours with a full quotation.

Wholesale MOQ bulk tattoo cartridge boxes

MOQ from 1,000 pcs

Standard sizes start low; mixed sizes allowed in one order.

Tiered factory pricing volume discount

Tiered Factory Pricing

The more you take, the lower the unit cost. Full price ladder with every quotation.

Fast lead time factory shipping

Fast Lead Time

Standard sizes ship from running production; OEM timelines confirmed with your quote.

Private label OEM packaging design

Private Label & OEM

Your brand, built on our production lines — in-house design and engineering support.

Explore the Wholesale Program OEM / Private Label

Qualified B2B buyers can request a free sample kit before committing to an order.

FAQs

Round Magnum cartridges go by a few names — Curved Magnums, Soft Edge Magnums. The needles sit in a curved arch instead of straight rows. That curve follows the body better. You get softer edges, ink flows more evenly, and transitions across shaded areas look cleaner. Because the needles touch the skin gradually rather than all at once, the ink goes in gentler. You can layer tones without beating up the skin.

Needle arrangement. Edge quality. That’s really it.

RM (Curved Magnum): Single curved arch. Soft, feathered edges. Moderate ink deposit. The curved shape hugs body contours and doesn’t hit as hard at the edges.

M1 (Weaved Magnum): Two straight rows in a staggered pattern. Maximum saturation. Clean, defined edges. Widest coverage per pass.

In plain terms: M1 throws down color fast with crisp edges. RM blends soft and the edges fade into the skin naturally.

>> See Tattoo Needle Cartridges Size Chart Explained

Pick RM when softness beats speed:

  • Portrait realism where the skin needs to look real, not tattooed
  • Black and grey with gradients that vanish into the surrounding skin
  • Soft color blending, watercolor effects, anything flowing
  • PMU work like powder brows where diffused edges are the whole technique
  • Curved body areas — shoulders, knees, ribs, face — flat needles skip and catch here
  • Any piece where a hard edge kills the illusion

M1 wins for packing big color fields fast, bold backgrounds, traditional work where sharp edges actually help the design.

>> See Tattoo Needle Cartridges Size Chart Explained

Needle diameters:

  • #10 (0.30mm): Standard. Daily shading and blending.
  • #12 (0.35mm): Thicker. Bolder saturation, more ink per pass.

Taper lengths:

  • Long taper (5.5mm): Finer point. Gentler deposit. Better for delicate skin and subtle gradients.
  • Medium taper (3.5mm): More direct flow. Faster saturation while keeping things smooth.

Yes. Universal fit with all major cartridge grips and rotary machines, including pen styles. Locks into standard 1-inch and 30mm grips with a snap-fit. If you’re already using premium cartridges from other brands, ours fit the same setup. No adapters. No rings. No hassle.

Integrated anti-backflow membrane in every cartridge. Blocks blood and ink from getting into your grip. Protects your machine and your next client from cross-contamination. Each cartridge is individually EO gas sterilized per ISO 11135, sealed in its own blister. Sterility indicators and expiration dates on every pack. Full batch traceability on every box — lot numbers tie back to production records, source material, sterilization validation, QC docs. Need to verify a batch? We pull the full record within 24 hours.

316L surgical stainless steel needles — same alloy as medical implants. It resists corrosion, holds an edge through long sessions, and cuts down on reactions for clients with metal sensitivities. Housings are medical-grade polymer, made in ISO Class 7 cleanrooms under ISO 13485. The membrane is medical-grade silicone with low-tension rebound that keeps its flex over 4+ hour sessions. No membrane fatigue halfway through a big piece.

100% EO gas. Individual blister packs. Every batch gets biological indicator testing under ISO 11135. Sterilization date, expiration date, and lot number on every blister. We don’t sell unpackaged or non-sterile cartridges. Period.

CE Marked. FDA Registered. KFDA Approved. ISO 13485:2016 certified. RoHS compliant. Full documentation available for global entry, customs, and your own audits. These aren’t self-reported — third-party auditors check us annually.

Private labeling, custom needle setups, OEM/ODM. Drop us a line and tell us what you need.

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About R&G Bio

Built on Precision.
Trusted Globally.

01

Where Precision Meets Medical-Grade Standards

ISO 13485 certified facility with ISO Class 100,000 cleanrooms. 316L surgical steel, complete traceability.

02

End-to-End Manufacturing Control

From needle configuration to sterile packaging, every step is precision-controlled with automated assembly and batch tracking.

03

Meeting International Regulatory Standards

CE Mark, FDA Registered, KFDA Approved, ISO 13485, RoHS Compliant. Full documentation for global market entry.

04

Trusted Tattoo Needle Manufacturer Since 2009

15+ years serving 50+ countries with premium cartridge tattoo needles and flexible OEM/ODM solutions.

Premium Tattoo & PMU Supply
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OEM / ODM SERVICES

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  • No. 703, Xincheng Avenue, Zengcheng District, Guangzhou City, Guangdong Province — Serving Global Markets