Keep your espresso machine running smoothly with De'Longhi's Natural Descaler. Laboratory tests prove that De'Longhi's liquid descaling fluid is up to three times faster and more effective dissolving limescale deposits when compared to traditional descalers. Developed from natural, this descaling fluid will help increase the life of your espresso machine and is an environmentally responsible alternative to harsh chemicals. Each 16.9-ounce bottle contains enough fluid for four cleanings.