10 packs set: Pack of 10 Professional Black Straight Nail Files Emery Cardboard. Double Sided Grit: These nail files are included on two sides. One side is 100 grit, suitable for nail shaping and styling. The other side is 180 grit which is used to polish the gel seal. Easy to use: The nail file is 7.01 x 0.79 x 0.16 inch / 17.8 x 2 x 0.4 cm, comfortable to grip and easy to use. It is very portable. Durable and washable: This nail file kit is made of high quality tape and emery board materials. It can be used for a long time and can be washed with water. Wide uses: Suitable for manicure, nail shaping, nail care, nail styling and nail painting. You can use them at home and in the salon. Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object received