POSEIDON Tattoo Cartridges 50-Pack Assorted Sizes — Disposable Membrane Needles, Universal Fit

POSEIDON Professional Tattoo Cartridges 50-pack are disposable, membrane-equipped needle cartridges in 10 assorted sizes designed for crisp lining, smooth shading, and universal machine compatibility.

Built for artists who need a dependable, ready-to-use supply, this kit contains ten needle configurations (5 of each) including round liners, round shaders, magnums and stacked magnums. Each cartridge features a spiral nozzle reservoir, laser-sharpened 316L stainless steel tips, and a triple-seal anti-leak system to reduce backflow and protect machines. Sterilized by ethylene oxide and vacuum sealed, the set supports sustained studio work and practice sessions with consistent performance.

How do these cartridges deliver sharp lines and smooth shading?

The tips are laser-sharpened and precision-brazed to PVC cartridges, producing a consistent point and alignment for accurate ink placement. Quality inspection at multiple stages helps maintain tip consistency so artists can rely on repeatable results across sessions.

• Laser-sharpened 316L stainless steel tips for crisp lines
• 12-point quality checks to ensure uniform sharpness
• Spiral nozzle design holds more pigment for even shading
• Durability rated for 6+ hours of continuous use

Will these cartridges prevent ink backflow and machine contamination?

Yes — a triple-seal safety system minimizes the risk of blowouts and backflow. The design combines a high-elasticity rubber membrane, a spiral ink reservoir, and a UV-bonded nozzle to form multiple barriers between ink and the machine internals.

• Membrane connection reduces fluid transfer into the grip
• Spiral reservoir traps excess ink away from the feed
• UV-bonded nozzle strengthens the cartridge-to-nozzle junction
• Disposable cartridges eliminate manual sterilization concerns

Are these cartridges compatible with my tattoo machine?

The cartridges use a standardized 0.35" (9mm) base designed to fit the majority of rotary and coil tattoo machines on the market. Most RS needles in this pack correspond to a Model #12 opening while the rest are Model #10, enabling plug-and-play operation without special adapters.

• Standardized 0.35" (9mm) cartridge base
• Works with major tattoo machine brands and models
• No calibration typically required for immediate use
• Pack includes common sizes for flexibility during sessions

What sizes are included and how do I choose the right one?

This 50-pack provides five cartridges each of 10 popular sizes: 3RL, 5RL, 7RL, 9RL, 5RS (Model #12), 9RS (Model #12), 9RM, 11RM, 15RM, and 7M1. Choose liners (RL) for fine lines, RS for tighter shading or small fills, RM for smooth gradients, and larger magnums for packing color quickly.

• 3–9RL: fine to medium lining and detail work
• 5RS/9RS: round shader options for concentrated shading
• 9RM, 11RM, 15RM: magnums for soft blending and saturation
• 7M1: a mixed configuration for versatile shading tasks

Who this is for: Professional tattoo artists, apprentices, and serious hobbyists who need a varied, sterile cartridge supply that balances precision and ink capacity. The pack suits studio environments and practice sessions where consistent tip performance, leak protection, and universal fit matter. If you require disposable, ready-to-use cartridges with robust anti-backflow features and a wide size selection, this POSEIDON set offers a practical, studio-ready solution.