A-minusone Tattoo Cartridge Needles — 50 Assorted Mixed Sizes (5× Each) | EO‑Sterilized, Anti‑Backflow

A-minusone 50-piece mixed tattoo cartridge set gives artists a full range of sterilized #10 needle configurations — five cartridges each of liners, shaders, magnums and bugpin sizes — ready for single-use with anti-backflow protection.

This mixed-pack of A-minusone cartridge needles groups commonly used sizes in one kit so you can switch quickly between fine lines, packing color, and soft shading without buying separate boxes. Each cartridge is double-sealed and EO-sterilized for single use. The cartridges use 316L surgical stainless steel needles inside a clear, medical-grade plastic housing with a stabilizer and membrane to reduce wobble and prevent ink or fluid entering the grip.

Which needle types are included and why do they matter?

The kit contains 50 cartridges in ten configurations chosen to cover line work, soft shading, tight detailing, and bold packing. Having multiple sizes on hand helps you select the right grouping for skin type, style, and area — from delicate script to saturated color blocks.

• 5 x 5RL, 5 x 7RL, 5 x 9RL, 5 x 11RL — round liners for crisp lines and outlines
• 5 x 5RS, 5 x 9RS — round shaders for small fills and gradients
• 5 x 15M1, 5 x 21M1 — magnum round for soft shading and smooth blends
• 5 x 15RM, 5 x 21RM — stacked magnums for dense packing and bold fills
• All cartridges numbered as #10 bugpin-style grouping for refined finishes

How do these cartridges protect my machine and improve reliability?

A-minusone cartridges include a one-way membrane and an internal stabilizer to limit backflow and reduce needle tip wobble. That design helps keep the rotary pen cleaner and reduces interruptions during a session, while the transparent tube lets you monitor ink pickup.

• Anti-backflow membrane reduces ink or fluid entering the machine
• Stabilizer minimizes lateral needle play for steadier lines
• Clear housing provides visual ink monitoring during shading or packing
• Universal fit works with most rotary cartridge systems for quick changes

Are these cartridges safe and ready to use out of the package?

Yes — each cartridge is EO gas sterilized and individually double-sealed for single-use. Open only when you are ready to apply the cartridge, and discard used cartridges responsibly following local regulations and studio protocols.

• Ethylene oxide (E.O.) sterilization for sealed sterility assurance
• Individually packaged and double-sealed to preserve sterility until use
• Single-use cartridges to support hygiene and cross-contamination control

Which machines are these compatible with and what materials are used?

These A-minusone cartridges were built to be compatible with most rotary tattoo pens that accept #10 style cartridge fittings. The needle wire is 316L surgical stainless steel and the housing is medical-grade plastic for durability and easy visibility.

• Universal cartridge connection fits most modern rotary machines
• 316L surgical stainless steel needles for corrosion resistance and strength
• Medical-grade transparent plastic tube for durability and ink visibility

Who is this for: This set is aimed at professional tattoo artists, apprentices building a toolkit, and mobile artists who need a compact assortment that covers liners, shaders, and magnums. If you want a variety pack for walk-in work, flash days, or practice sessions without committing to single-size boxes, this 50-piece A-minusone kit supplies common sizes with sterilized, anti-backflow cartridges ready to drop into most rotary pens.