Silver-plated 1mm snake chain, with lobster clasp, chain necklace - a popular jewelry staple - you just have to choose the size you want. We have no idea of the base metal used.
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Price is for 1 chain, in the size you select. All the chains are the same width, color and lobster clasp ends except for the 30" chain has a different end as shown in the small upper right hand corner of my photo. This picture is enlarged to show detail.