Material:sandpaper on surface,sponge(eva) on second layer, plastic(pp) in middle-level.size:18*2.8cmcolor:greypackage include: 10pcs nail filesfeature: 1)essential nail art tools for filing nails before nail treatment / nail extension / manicure procedures.2)can be used to file natural nails, nail extensions, false nails, etc. 3)perfect for finger care, salon,and woodworking usage.4)perfect for both personal and professional use.