Stigma EN05 Series Disposable tattoo needle cartridges with Membrane Sterilized package, designed by tattoo artist for tattoo artists..Professional Tattoo Needles are harmless, sterilized stainless steel for daily use..Made of 304 surgical stainless steel and medical-grade plastic. E.O. sterilized and packaged in blister pack..The round needle tips designed with a slope and the flat tips designed with a arc, very suitable for detailed art works. Rubber band loaded cartridges, with plastic membrane so that tattoo ink won't flow back to the tubes..Each needle could compatible with standard cartridge tattoo machines and grips. Carefully designed and more convinient to use.