Silver Plated Extra Large Necklace Extra Heavy Duty Round Memory Wire - .5 oz. Wire width 1.0mm. Steel memory wire is a carbon steel wire that has been plated with silver. Memory Wire is stainless steel wire, made into coils and sized for rings, bracelets, and necklaces. This wire is ideal when you want the shimmer and shine of plated metal. Approximately 5 coils per pack.