Micro Cell 2000 Supersonic Professional Glass File is a fine-grained glass file that files the nails gently.The nail file seals the nail tip and prevents the nails from cracking or splitting into layers, leaving a smooth and nice nail tip.Use:Always file in one direction. File with a steady speed and movement to prevent the nails from chipping.Clean the file with water after use.0 ml Micro Cell Supersonic Professional Glass File