1.Durable Construction: This sturdy Miami Cuban chain features anti-allergic 316L stainless steel, six-sided seiko mirror polishing with durable lobster buckle reinforcement, making it look gorgeous and shiny, effectively resisting discoloration, sweating and corrosion, and no risk of falling off with intense exercise. 2.Accurate size: Choose from a variety of sizes to meet different needs, 5mm width and 16/18/20 inches length. (16/18 inches is the ideal size for women), 20 inches are suitable for most men, so choosing a larger size will make it more comfortable to wear Men/Women's sturdy Miami Cuban chain necklace, six-sided super-precision mirror polished, width 5mm, length 16/18/20 inches, corrosion-resistant 316L stainless steel, light luxury gift box packaging