The BWT Bestsave L set of 10 limescale protection pads offers perfect basic limescale protection for all coffee machines that have a water tank. The limescale protection pad is very easy to use. After unpacking, it is briefly rinsed under running water and placed directly on the bottom of the coffee maker's tank. BWT Bestsave L set of 10 is ideal for smaller vending machines and coffee outlets. It is best to optimize the water overnight so that there is enough water available for coffee preparation the following day.