Polishing Nail File composed by 2 faces of different grits 1000/4000. The 1 phase (light green side) is used to smooth the nail surface, whereas the 2 phase (white side) is used to polish the surface. This file is indispensable also during the Nails Extension, Retouching and Refill procedures to smooth the French thickness or, in the phase of Gel removal, directly for the natural nail polishing. The materials that compose this File makes it washable with liquids.