We're all familiar with nickel because it's given its name to our 5-cent coin even though in that case it's really mostly copper. The name is better suited for Canadian nickels which were, in fact, made of 99.9% pure nickel for many years (but no longer). It is also always present in small amounts in ordinary steels and figures prominently in batteries and the manufacture of magnets. The sample here is of very high purity meant for use in the electronics industry where impurities become a much bigger issue.