From UNOde50, this bracelet features:  Each UNOde50 piece is unique. Designed and manufactured at its headquarters in Madrid, all products are handcrafted in Spain. All of our jewelry is made of a special metal alloy. The pieces are then plated with silver or 18K gold. All jewelry is hypoallergenic and nickel free.  Line bracelet Silver-tone plated metal Signature UNOde50 lock accent Handmade Approx. 7.75" long 1-year warranty  Imported.