SELWAYTattoo Needle Cartridges allow the tattoo artists to easily switch needle sizes without having to switch tattoo machines. This item comes with a Multi pack of Different Sizes of Cartridges. Each Needle cartridge is individually sealed in sterile packaging. Each Cartridge is sterilized by EO Gas & Independent Blister Packing. Cartridges Stabilizer can provides more safety, more precise and more stable for you PMU working. Perfect for Ombre brow Nano brows and hair stroke brows. This will fit for Charmant Permanent Tattoo Machine. Available size: 3F CARTRIDGES: Fits for lip contour, denser hair on eyebrows, eyeliner, camouflage shading. 5F CARTRIDGES: Fits lip shading, eyebrows, lip outline, eye line, shading camouflage scars. 7F CARTRIDGES: Fits eyeliner, lip shading and nipple reconstruction, camouflage scars. This tattoo needles used on eyebrow, eyeliner, lip contour. Note: This micro-needle diameter is 8 mm, it can fit liberty machine, but as there are several types Charmant tattoo machine on the market, they fit different needle, so please kindly check it before buying or contact us if you are not sure, we will do best for you anytime!