The Parker Hannifin Corporation Metal-Safe Ice Machine Cleaner #H421 can be used for cleaning all types of ice machines- cubes, flakes or tubes. They are also used for cleaning commercial dishwashers. This product restores the efficiency of the ice machines as well as its taste. It does so by removing the build-up of the limescale which develops on the ice machines which has the ability to insulate cold plates and decrease the ice production.This product can be used to brush on hard to clean parts. This is a versatile product that can work on all types of ice machines as well as commercial dishwashers. Ice Machine Cleaner for Parker Hannifin Part# H421 Parker Hannifin Corporation Metal-Safe Ice Machine Cleaner #H421