Materials: rubber board, sponge layer (EVA layer), environmental protection sand paper Specification: 178 * 20 * 8 mm, 178 * 30 Nail filesMaterials: rubber board, sponge layer (EVA layer), environmental protection sand paperSpecification: 178 * 20 * 8 mm, 178 * 30 * 4 mm, 178 * * 12 mm 30, 89 * 20 * 8 mmCharacteristics: the bright color, coarse grinding sand surface sharp, durable, fine grinding ...