Replaceable Sandpaper Discs Features: Reliable adhesive backing, easy to stick and won't slip off. It is easy to replace a new sandpaper disc after using. Our sandpaper disc is added with emery particles that won't harm your skin, 1 people 1 sandpaper disc, ideal for nail salon or home use. Its size is: 1.69" in diameter. This replaceable sandpaper discs is suitable for all round electric callus remover foot file of the same type, it easily removes dead dry hard cracked skin from feet. .......... How to choose the suitable foot file sandpaper discs refill: 60 grit is coarser than 80 grit, and 80 grit is coarser than 100 grit, and 100 grit is coarser than 180 grit. ........... How To Replace Sandpaper Discs? Step 1 Tear off protective layer. Step 2 Paste it on the machine. Step 3 After using, easy to remove it from the electric callus remover. Package List: 1 Box Replacement Sandpaper Disk (60pcs) ( 80 Grit) The sandpaper disk size: The diameter is 1.69 inch