XLD Toilet Bowl Cleaner is effervescent and formulated with phosphate detergents and other cleaning agents to attack urinary salts. The water-soluble packets dissolves in the bowl, releasing a blue foaming action and pleasant fragrance. Contains no caustic or harsh acids. Safe on plumbing fixtures, porcelain, metal, wood, painted surfaces, flooring and drain pipes. Made with bio-based ingredients. Contains 100 - 1/2oz packets. All XLD cleaners are sorted and packaged by individuals with barriers to employment in Rochester, NY.