Cleans & freshens. Duo-cubes. In-tank automatic toilet cleaner. Non-stop clean. Freshens. Safe for toilet components. Up to 16 weeks. Blue water. Toilet care. Helps fight toilet ring, hard water & limescale stains. Safe for toilet components. Easy to use. Septic tank safe. www.softscrub.com. Questions or comments? Call 1-800-290-0158 or visit us at www.softscrub.com. Please recycle. Made in Poland.