MEDICAL-GRADE MANUFACTURING
Professional Round Liner Tattoo Cartridges for Precise Line Work
At R&G Bio, we manufacture disposable tattoo needle cartridges for tattoo shops, distributors, and permanent makeup artists around the world.
Our round liners do one thing well: they draw clean, accurate lines. We carry them in #08, #10, and #12 gauges, with needle counts ranging from tight 1RLs up to thick 14RLs. The ink feeds consistently, the needle sits stable in the grip, and the performance holds steady from the first cartridge in the box to the last. Fine detail work or heavy outlining—either way, the line goes where you send it.
Each cartridge has a membrane to stop backflow. They’re individually sealed and EO gas sterilized, with batch numbers for full traceability. Needles are 316L surgical stainless steel, housings are medical-grade polymer, and the whole operation runs inside ISO Class 7 cleanrooms under ISO 13485.
Tight Circular Grouping
Safety Membrane
EO Sterilized
OEM/ODM Ready
Model Reference
For example – 0801RL
08 – Needle Diameter (Gauge)
01 – Needle Count
RL – Needle Configuration
Needle Diameter (Gauge)
08 = #8 (Bugpin, approx. 0.25 mm)
10 = #10 (Standard, approx. 0.30 mm)
12 = #12 (Standard, approx. 0.35 mm)
Needle Count
01 / 03 / 05 / 07 / 09 / 11 / 13 / 14 / 15 / 17 / 18 / 23 / 27
Needle Type
RL = Round Liner
RS = Round Shader
M1 = Magnum (Double Stack)
RM = Round Magnum
What Are Round Liner Cartridges?
🔬 Needle Structure
Round liners are the default in most shops. The needles pack into a tight circle, every tip converging on one point. That gives you a single, sharp hit against the skin.
The number is your needle count. Grab a 1RL or 3RL when you need something fine and delicate. Step up to a 9RL, 11RL, or 14RL for thick, bold lines that push more ink with each pass.
Primary Uses & Applications
Outlining & Line Work: Creating the foundational outlines and contours of tattoo designs
Detailed Patterns: Intricate geometric designs, mandalas, and fine ornamental work
Lettering & Script: Clean, readable text tattoos with consistent stroke weight
Fine Details: Small accents, highlights, and delicate elements in complex pieces
PMU Hair Strokes: Natural-looking eyebrow microblading and hair stroke simulation
Dot Work: Precise stippling and pointillism techniques
Size Selection Guide
1RL–3RL: Micro-lines, fine details, PMU hair strokes, minimalist designs
5RL–7RL: Standard outlining, general tattoo work, medium patterns
9RL–14RL: Bold outlines, heavy traditional work, tribal patterns, large fills
Common RL Configurations
* 1RL – “1” indicates Needle Count
1RL
Single Needle
Micro Detail
3RL
Fine Lines
Details
5RL
Standard
Outlines
7RL
Thick Lines
Bold Work
9RL
Heavy Lines
Large Work
Technical Specifications
|
Material |
316L Medical Stainless Steel |
|---|---|
|
Needle Diameter |
#08 (0.25mm) / #10 (0.30mm) / #12 (0.35mm) |
|
Taper Length |
Long (5.5mm) / Medium (3.5mm) / Short (2.0–2.5mm) |
|
Safety Feature |
Patented anti-backflow membrane |
|
Sterilization |
EO Gas, individually blister packed |
|
Packaging |
20 pcs/box (standard) / Custom OEM |
Explore Different Cartridges
Tattoo Cartridges with Membrane
Magnum tattoo cartridges
Round shader tattoo cartridges
Round liner tattoo cartridges
Round Magnum Tattoo Cartridges
Tight Round liner tattoo cartridges
Hollow Round liner tattoo cartridges
Bugpin Round liner tattoo cartridges
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.
FAQs
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.