A tattoo cartridge is a pre-made, disposable unit that contains a needle and other components needed for tattooing. It is designed to be used with a tattoo machine and can be easily attached and detached for quick and efficient tattooing. Tattoo cartridges are often made of plastic and come in different configurations, including round liners, round shaders, magnums, and flats. They can also have different needle groupings, such as single needle, double needle, or multiple needle configurations. Using tattoo cartridges can be more hygienic and efficient than traditional tattoo needles, as they reduce the risk of cross-contamination and can save time by eliminating the need to assemble and disassemble traditional needle setups