Our finger guards are designed to help protect vaccinators' fingernails from their impact with syringes. To use, slide the ring over the tip of your finger with the guard covering your nail. Now you can flick without discomfort! The guards are made of PLA and ABS plastic. They can be disposed of after each use or can be used throughout the day (differs per clinic). Each box has 10 extra larges, 10 larges, 30 mediums, 40 smalls, and 30 extra smalls (Box total is 120 units).