Duck Fresh Discs Toilet Cleaner Starter Kits, Fights Stains That Harbour Germs, Prevents Limescale Build Up, Lime, Starter Kit (1 Holder + 3 Refill Tubes)Duck Fresh Discs the toilet cleaner that extends that fresh clean smell with no germy cage Just stamp in the toilet bowl to help clean and freshen with every flush The toilet bowl cleaner that prevents the buildup of limescale and stains that harbour bathroom germs Duck Fresh Discs use 30 Percent less plastic than rimblocks (over 6 months of use) Keep toilet bowls clean for at least 18 weeks (4 months+)