Product - Magnum Cartridges with Membrane Needle Size - Standard #12 or #10 Needle Gauge/Diameter Brand - Radical® Sold In - Boxes of 20pcs Sterilized - EO Gas Sterile Compatibility - These cartridges are industry standard and will fit all machines and grips. These cartridges have a membrane to prevent ink spit back. The Radical® Needles are made with high-quality steel and soldering. These cartridges have a precision clear grey tip for visual control & perfect ink flow. These needles go through strict quality control to make sure you get a great high-quality tattoo needle.