MATERIAL The necklace was made in Stainless Steel is an alloy of iron and carbon, and sometimes other elements. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Iron is the base metal of steel. The Steel is an hypoallergenic metal, an antitrust material 100% nickel free. LENGHT: 80cm