POSEIDON Professional Tattoo Cartridges Needles 50-Pack, Assorted Sizes — Disposable with Anti-Backflow Membrane

POSEIDON Professional Tattoo Cartridges Needles 50-Pack is a sterile, assorted set of disposable cartridge needles engineered for precise lining, smooth shading, and broad compatibility with most tattoo machines.

Whether you’re building a starter kit, stocking a tattoo studio, or practicing new techniques, this 50-piece assortment delivers a broad range of needle configurations in one hygienic package. The set includes ten popular sizes, each supplied in groups of five, and features design details aimed at reducing ink backflow, improving ink capacity, and delivering consistent tip sharpness for clean results.

Which needle sizes are included and what does each style do?

The pack contains ten needle types: 3RL, 5RL, 7RL, 9RL, 5RS, 9RS, 9RM, 11RM, 15RM, and 7M1. Round liners (RL) concentrate pigment for crisp lines, round shaders (RS) are for soft fills and small details, round magnums (RM) offer broader coverage for shading, and the 7M1 is a mixed configuration for versatile work.

• 3RL–9RL: fine to medium liners for detailed lines and script.
• 5RS, 9RS (Model #12): tight shaders for subtle blending and small areas.
• 9RM, 11RM, 15RM: magnums for efficient shading and packing color.
• 7M1 (#10): mixed grouping useful for textured fills and transitions.

How does the cartridge construction improve performance during a session?

These cartridges use a spiral nozzle reservoir to hold roughly 30% more pigment than conventional tips, and laser-sharpened Japanese-grade 316L stainless steel needles for consistent edge retention. The result is fewer re-dips, smoother pigment flow, and reduced vibration for steadier hand control over extended sessions.

• Spiral nozzle increases ink capacity for longer uninterrupted work.
• 316L stainless tips brazed to PVC cartridges for strength and stability.
• Laser-sharpened points for clearer lines and smoother shading transitions.

What safety features prevent contamination and machine damage?

POSEIDON cartridges include a triple-seal anti-leak system combining a high-elasticity rubber membrane, a spiral ink reservoir, and a UV-bonded nozzle to minimize blowouts and backflow. Each needle is EO-gas sterilized and vacuum-sealed, meeting common hygiene standards so you can focus on technique without worrying about cartridge integrity.

• Triple-seal design reduces ink backflow and machine contamination risks.
• Ethylene oxide sterilization and vacuum packaging for sterile assurance.
• Individual packaging keeps cartridges sterile until use.

Will these cartridges fit my tattoo machine and how reliable are they?

The cartridges use a standardized 0.35" (9mm) base, designed to be compatible with most major cartridge-style tattoo machines for plug-and-play use. Each needle goes through multiple inspections for sharpness and balance, and Poseidon provides customer support and a defect replacement promise for added confidence.

• Standard 9mm cartridge base for broad machine compatibility.
• 12 quality checks per needle for consistent performance and vibration reduction.
• Customer support, lifetime defect replacement, and refund policy included.

Who is this for: This 50-pack suits professional tattoo artists, apprentices, and dedicated hobbyists who need a comprehensive selection of disposable cartridges for lines, shading, and color packing. It’s ideal for anyone seeking a sterilized, ready-to-use assortment with anti-leak protection and broad machine compatibility to streamline workflow in studio or practice settings.