Sterilized and hygienic - single-use disposable material with medical plastic tips Efficient cartridge change and replacement. Removable Front Cap for Better Cleaning Quality made tattoo cartridge needles with a rubber membrane to reduce cross-contamination and spills while tattooing. Safety membrane keeps pigment, germs, bacteria, etc. from entering the motor or client 20 Needle Cartridges Per Box FYT Cartridges for tattoo professionals are a must. These Round Liners are made from some of the best tattoo needles on the market and come in a variety of grouping configurations as well as having a rubber membrane that effectively minimizes the cross contamination when tattooing.