This is a set of 5 packs of Lion DENT EX Ultra Floss, 10 pieces per pack (M (for general interdental use)). These were purchased a few years ago and are unopened. The box design may be a bit old. They have been stored in a clean box. The floss taken out in the image is from another box. I took the picture to show the colors clearly. There are three colors. ＜For periodontal disease prevention＞ For cleaning the interdental gingival sulcus, where periodontal disease is likely to occur and progress slowly. ＜For the interdental spaces of the upper anterior teeth＞ For areas with tight contacts or poor tooth alignment, which are at high risk of caries. ＜For the prevention of caries on adjacent surfaces＞ Effective for preventing caries on the adjacent surfaces of deciduous molars, where dirt tends to accumulate as the jaw grows. ＜For children's finishing brushing＞ The small holder can easily reach the back of the mouth, allowing for plaque control on the adjacent surfaces of molars. ※M (for general interdental use) Elementary school students can develop the habit of flossing. Cavity prevention Periodontal disease prevention Oral care Dental floss Floss picks