18" fine gold plated brass serpentine chain necklaces. 19 links per inch. Outer link dia. is 1.1x2.4mm and wire is 0.60mm/.023" thick. Finished with spring-ring or lobster clasp. Get a karat gold look for an economical price with gold plated jewelry chain. Gold plated chain may tarnish over time. If it does, polish with care. Rigorous polishing can wear down the gold surface.