Regular egular: use of descaling tablets are important for removing mineral limescale build up in your machine. And it can proper and to maintain consistent grinder performance. Better Tasting Coffee: Descaling tablets gives you huge savings for better tasting espresso and help extend life of your grinder. Prevent Flavor Transfer: perfect for use to prevent flavor transfer when switching between regular, decaffeinated and flavored coffee beans. Best use time: Descaling or decalcification is performed according to each manufacturer's instructions, usually once a month. 2 pieces for each cleaning. Scope of application: coffee machines, electric kettles, water dispensers, humidifiers, disinfection cabinets, tea cups, egg steamers and other places where dirt needs to be removed. colour:white Material:Solid effervescent tablets size:15x15x7mm Package Contents: 20 x effervescent tablets Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.