This is a 67mL refill for Kobayashi Pharmaceutical. ⚫︎There is a mark where a sticker was peeled off on the bottom right of the back, and it was sticky, so it has been masked. It has a 99% disinfection rate* and suppresses the formation of black stains at the waterline*, making cleaning easier. *Effect on bacteria that cause black stains at the waterline. Not all bacteria are eliminated. Based on verification results in our laboratory. ※Black stains may still occur during the usage period. Contains cleaning and stain-resistant ingredients that coat the toilet bowl, preventing dirt from adhering and keeping the toilet bowl clean. The effect may vary depending on the environment and the degree of soiling. It cannot prevent stains on parts where water does not flow. Can be used for approximately one month (3-4 weeks). In standard use. The duration may vary depending on temperature, water temperature, and water volume. The flowing water is colorless. This product is designed with consideration for the impact on equipment in the tank, the toilet bowl, septic tanks, and bacteria in septic tanks.