Applicable population: general populationSpecifications: 9cm*1.4cm*0.3cm flat head without mirror, 9cm*1.4cm*0.3cm flat head without mirror+storage boxPackaging: small storage boxMaterial: glass, nanoProduct type: polishing nail file file polishing nail toolsApplicable Space: Modified A/Polished/Brilliant AHow to use1.Wash your hands and nails before use.2.Trim and shape your nails by moving sideways, grinding out the edges.3.Place horizontally onto your nail surface and rub on polish and shine.Brush off remaining dust from your fingernails.Precautious1.Keep away from children.2.Do not bend or twist with great strength.3.Stop using after damaged.4.Washed by water after using.Note: manual measurements may have slight errors