Quantity & Size: 12 pcs, 7" x 0.8"(L x W). PREMIUM QUALITY: The nail file set is made of high quality tape and emery board materials, designed with round top and double sided , Sandpaper on the surface, sturdy and durable, can be used for a long time. 100/180 Grit Double Sided Gel Files: The 100 grit side is the rough gravel side to cut the nail gel quickly and easily remove, suitable for toenails, gel/acrylic nails and hard natural fingernails. 180 is medium grit, ideal for shaping natural nails. Easy to clean and washable. These nail filing tools are very easy to clean and washable. Simply rinse with antibacterial soap and preferably disinfect with alcohol. Double-sided: Use the finer side to shape your nails and use the coarser side to file off the top layer of nail gel.