This is a 440 plus gram ball of 99.995 ultra pure Zinc metal. This is ideal for many uses, these are used for galvanizing iron, making alloys and can be cast as is or mixed with other metals. They make interesting samples for element collectors too. With this high purity it is suitable for use in many applications in chemistry too. These balls are also suitable for use as a sacrificial anode for cathodic protection of boats etc.