Automatic toilet bowl cleaner hangs inside the bowl to provide a Complete Clean? result. Freshens with every flush, for up to four weeks. Leaves a pleasant scent for the entire bathroom. Application: Bowl Cleaner; Applicable Material: Ceramics; Enamel; Metal; Chemical Compound: Sodium C14-16 Olefin Sulfonate; Sodium Dodecylbenzenesulfonate; Dirt Types: Bacteria; Grime; Mildew; Mineral Scale; Mold; Organic Matter; Rust; Soil; Stains.