18" fine silver plated brass serpentine chain necklaces. 19 links per inch. Outer link dia. is 1.1x2.4mm and wire is 0.60mm/.023" thick. Silver plate is a thin surface layer of actual silver. Finished with spring-ring or lobster clasp.
Was attracted by the price but like other reviews, the quality isn't great and you do need to expect one or two bad necklaces per dozen. Sometimes it was the spring clasp, otherwise it was the connection to the clasp. Oh well.