The Fresha Flush Microbial Disc is a silver disc placed in the cistern of a toilet. It destroys germs, reduces limescale build-up and provides a sterile flush every time. Made from natural materials, the environmentally friendly silver disc is everlasting so there is no need to ever replace it. One should be bought per cistern/toilet. The Fresha Flush disc uses the same industrial silver you would find in drinking water purifiers and hot tub filters and uses the natural effects of real silver that when immersed in water kills germs, bacteria and water borne diseases. It also has a strong ultra-neodymium magnet which crystallises limescale preventing limescale forming on toilet surfaces. Water therefore stays fresh, preventing the need to bleach toilets which has a positive impact on the environment and in the long run saves you money. The high-quality disc is both incredibly effective, reliable and hygienic and abides by European standards.