Size: U18-0.Set of 5 new 18MM Disposable microblading pens 18U with diameter 0.18MM Disposable microblading hand tools with sharp blades Our microblades be made with surgical grade 316 stainless steel and are EO gas sterilized to keep your clients safe. Each microblade is covered with protective cap to keep the needles safe during transit Safe non slip design to keep that you are working on with our microblading supplies safe and comfortable and non slip