This kit is designed for all types of coffee makers, espresso machines, and kettles. Coffee makers, espresso machines, and kettles require regular descaling, a process that ensures a longer lifespan. This activity, which is very easy, should be done a few times a year. Krups recommends this set, which consists of 2 sachets of descaling powder and 1 water hardness tester for descaling all types of coffee makers, espresso machines, and kettles. Package contents: 2 sachets of 40g descaling powder and 1 water hardness tester. Suitable for all espresso machines, multi-beverage machines (Nespresso, Dolce Gusto), and kettles. Removes scale powerfully and quickly.