From UNOde50, this necklace 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. Add the perfect finishing touch to any outfit with this necklace decorated with characteristic round silver plated pieces and one charm, the signature padlock of Uno de 50. Frontal necklace Silver-tone metal Ball chain closure Handmade Approx. 18" long 1-year warranty Imported.