Durgol Swiss espresso machine decalcifier solution gently but thoroughly dissolves lime deposits that build up with time and use. This set includes ten bottles, each with 4.2 ounces of solution. It is uniquely formulated to protect and care for quality espresso machines of all brands, including fully automatic machines, semi-automatic machines, and manual machines, as well as traditional drip coffee makers and pod coffee makers. Compatible with machines of all types and brands, including Ninja, Jura, Nespresso, De'Longhi, Breville, Bosch, Cuisinart, Keurig, Moccamaster, Mr. Coffee, and Black+Decker. Electric water kettles and tea kettles can also be decalcified with this solution, and it is guaranteed to decalcify quickly and easily. Regular use of this special formula will ensure the optimal quality of your espresso and extend the life span of your machine. Durgol Swiss espresso machine decalcifier solution leaves no residue and after decalcification and rinsing, your machine is completely safe for use