Tight Round Liner Cartridges for Crisp, Controlled Lines
R&G Bio manufactures tight round liner tattoo cartridges for distributors, studio chains and private-label brands worldwide — built for artists who want sharper control and tighter line definition than a standard RL.
In a tight RL the needles sit closer together, keeping ink flow consistent and spread minimal. The result: crisp outlines, small details and clean precision work, with a needle that stays steady in the grip from the first pass to the last.
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.
Model Reference
For example – 1003RL
10 – Needle Diameter (Gauge)
03 – Needle Count
RL – Needle Configuration
Needle Diameter (Gauge)
10 = #10 (Standard, approx. 0.30 mm)
12 = #12 (Standard, approx. 0.35 mm)
Needle Count
03 / 05 / 07 / 09 / 11 / 14
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 · 0.30MM — THE EVERYDAY TIGHT LINER RANGE
|
MODEL |
GAUGE |
TAPER |
NEEDLE COUNT |
MEMBRANE |
STERILIZATION |
FIT |
TYPICAL USE |
|---|---|---|---|---|---|---|---|
|
1003RL-TR |
#10 · 0.30mm |
0.7mm |
3 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Fine crisp lines, small script, detail outlines |
|
1005RL-TR |
#10 · 0.30mm |
0.7mm |
5 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Clean fine-to-medium outlines, lettering |
|
1007RL-TR |
#10 · 0.30mm |
0.7mm |
7 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Everyday crisp outlines, controlled linework |
|
1009RL-TR |
#10 · 0.30mm |
0.7mm |
9 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Medium-bold outlines with sharp edges |
|
1011RL-TR |
#10 · 0.30mm |
0.7mm |
11 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Heavier outlines that must stay crisp |
#12 · 0.35MM — CRISP EDGES ON BOLDER LINES
|
MODEL |
GAUGE |
TAPER |
NEEDLE COUNT |
MEMBRANE |
STERILIZATION |
FIT |
TYPICAL USE |
|---|---|---|---|---|---|---|---|
|
1203RL-TR |
#12 · 0.35mm |
0.7mm |
3 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Fine-to-medium lines with extra presence |
|
1205RL-TR |
#12 · 0.35mm |
0.7mm |
5 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Everyday crisp outlines, neo-traditional detail |
|
1207RL-TR |
#12 · 0.35mm |
0.7mm |
7 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Bold-but-sharp outlines, large lettering |
|
1209RL-TR |
#12 · 0.35mm |
0.7mm |
9 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Heavy outlines with clean, defined edges |
|
1211RL-TR |
#12 · 0.35mm |
0.7mm |
11 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
Very heavy outlines, controlled bold work |
|
1214RL-TR |
#12 · 0.35mm |
0.7mm |
14 |
Yes, built-in |
EO Gas · ISO 11135 |
Universal cartridge grip |
The widest tight line — bold outlines, crisp borders |
Built Like a Medical Device, Priced for Wholesale
Tighter grouping means tighter tolerances — a few microns of drift and the point is gone. Here is how we keep every tight liner identical.
01 Close-Packed Machine Soldering
The needles are drawn closer together than a standard RL and soldered by machine, so the point forms the same way on every unit. Tight grouping plus consistent soldering is what makes the same count pull a thinner, crisper line — box after box.
02 Safety Membrane System
A medical-grade silicone membrane sits inside every cartridge. It keeps needle tension steady through long, controlled lining 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.
04 Medical-Grade Housing
The shell is medical-grade polymer with a clear tip, so artists see the ink channel working while they line. Low-friction inner walls keep the needle stable. The standard fitting works with most rotary machines and cartridge grips.
05 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.
06 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.
Two Ways to a Finer Line — and How to Stack Them
There are two ways to make a line thinner. Bugpin needles go thinner on the steel itself — 0.25mm instead of 0.35mm. A tight grouping goes tighter on the arrangement — same needles, packed closer. The results stack: a tight RL with #12 needles already lines thinner than a standard RL with the same count, and a tight grouping in #08 bugpin diameter is the finest combination we make. If your artists want crisp, controlled lines without giving up ink presence, tight RL is the middle ground between a standard liner and a super tight liner.
Where Tight Liners Work Best
One job: crisp, controlled outlines. If the line must stay exactly as wide as planned, this is the needle.
Neo-Traditional Detail
Neo-traditional mixes bold frames with fine interior lines. A tight 5RL or 7RL keeps the detail lines crisp without going full fine line.
Script & Lettering
Letters need consistent line weight from first stroke to last. The focused ink flow of a tight 3RL or 5RL keeps every character clean
Geometric & Ornamental
Intersections and parallel lines expose any spread instantly. The compact point of a tight liner keeps geometry sharp at every crossing.
Illustrative & Crosshatching
Crosshatch shading is hundreds of fine lines side by side — each one must stay thin and separate. Tight liners hold that discipline.
Small Number, Crisp Detail. Big Number, Crisp Bold.
Needle count sets the line width — the tight grouping just keeps every width sharper than its standard equivalent.
3RL
Crisp fine lines, small script
5RL – 7RL
Everyday crisp outlines, lettering
9RL – 11RL
Bold outlines with sharp edges
14RL
The widest tight line
Tight RL vs Standard RL
Same needles, same counts — the only difference is how close they sit. That gap decides how the line lands.
|
TIGHT RL |
STANDARD RL |
|
|---|---|---|
|
Grouping |
Needles packed closer, smaller point |
Standard spacing, standard point |
|
Line Width (same count) |
Thinner, crisper |
Bolder |
|
Ink Flow |
Restricted and focused, steady delivery |
Standard, faster saturation |
|
Feel |
Firm, compact, highly controlled |
More forgiving, more flow |
|
Line Edges |
Sharp and defined, minimal spread |
Clean, slightly fuller |
|
Best For |
Crisp outlines, detail lines, lettering, geometry |
Everyday outlines, bold traditional lines |
Compare with the rest of the liner family: Round Liner (RL) cartridges, Super Tight Liner cartridges for the finest point we make, Bugpin Round Liner cartridges for thinner steel, and Hollow Round Liner cartridges for the opposite — maximum ink flow.
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.
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.
MOQ from 1,000 pcs
Standard sizes start low; mixed sizes allowed in one order.
Tiered Factory Pricing
The more you take, the lower the unit cost. Full price ladder with every quotation.
Fast Lead Time
Standard sizes ship from running production; OEM timelines confirmed with your quote.
Private Label & OEM
Your brand, built on our production lines — in-house design and engineering support.
Qualified B2B buyers can request a free sample kit before committing to an order.
FAQs
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Find Expert insights
About R&G Bio
Built on Precision.
Trusted Globally.
Where Precision Meets Medical-Grade Standards
ISO 13485 certified facility with ISO Class 100,000 cleanrooms. 316L surgical steel, complete traceability.
End-to-End Manufacturing Control
From needle configuration to sterile packaging, every step is precision-controlled with automated assembly and batch tracking.
Meeting International Regulatory Standards
CE Mark, FDA Registered, KFDA Approved, ISO 13485, RoHS Compliant. Full documentation for global market entry.
Trusted Tattoo Needle Manufacturer Since 2009
15+ years serving 50+ countries with premium cartridge tattoo needles and flexible OEM/ODM solutions.
OEM / ODM SERVICES
Contact us for wholesale pricing and custom configurations
Get In Touch
Request a Quotation
Tell us about your requirements and our team will respond within 24 hours with a detailed quote including pricing, lead times, and customization options.