Say stop the use of plastic water bottles and fight limescale effectively with pink EM ceramic beads. Ecological, economical and sustainable, they filter water by adsorption (like binchotan coal). 100% natural and compostable, they revitalize tap water and reduce its unpleasant taste. Use exclusively in a carafe, or bottle. Durability: 6 months To be renewed beyond. Composed of clay fermented with effective natural microorganisms and fired at 800° C. Tubular shape. Do not use in a kettle. Original product from the work of Professor Teruo Higa Sold in bulk Delivered with their exhaustive instructions in recycled paper size A6.