ForPro Zebra Foam Boards are made from the finest adhesive, foam and sandpaper. They feature medium 180 grit on both sides to quickly and easily file nails to desired shape, giving edges a flawless finish. The cushioned core allows for fast, easy, and precise filing of nails. They are perfect to remove excess product leftover from gel and acrylic nails.ForPro Professional Collection features the highest quality, best value, and largest selection for professionals and consumers. All products include 100% unconditional guarantee.