Sanitizable Nail Board: Made of the finest adhesive, Mylar plastic and sandpaper. Blue Nail File: Each foam board features coarse 120 grit on one side and medium-fine 240 grit on the other side. Manicure Nail File: Also ideal for pedicures, the cushioned core allows for fast, easy, and precise filing of nails. Double-Sided Nail File: Washable and sanitizable, the nail filer is perfect for use on natural and acrylic nails Grit Nail File: Each nail file measures 7” L x 7.5 W in dimensions and comes in a 50-count pack.