Features: Carefully formulated with sodium bicarbonate and sodium lauryl sulfate. Designed to clean the inside of the toilet bowl during flushing. Extremely convenient: Includes three cleaning blocks; simply add one at a time. Place the blocks in a dedicated container (original container recommended). After using one, replace it with the next. Place the container containing the blocks in the toilet tank and allow it to sink naturally. Let it sit for approximately 10 minutes until the blocks are completely dissolved and begin to work. After each use, flush the toilet normally for automatic cleaning. Each block lasts approximately 2-3 days, depending on water consumption and frequency of use. This product automatically cleans the toilet's internal pipes, reducing residual dirt. Net Content: 120g Keywords: Toilet Cleaner Ingredients: Sodium Bicarbonate, Sodium Lauryl Sulfate Product Size: 6.8*10.5cm Shelf Life: 3 Years Storage: Store in a cool, dark place.Note: 1. Due to different monitors and lighting effects, actual color may vary slightly from the image.2. Due to manual measurement, please allow 1-3cm deviation.