This 2.2 mm Bismarck chain is crafted from environmental copper and finished with refined 18K gold plating for a clean, retail-ready look. Hypoallergenic, nickel-free, cadmium-free and water-resistant, it ensures stable batch quality for bulk orders. This necklace is Xuping Jewelry, ideal for wholesale jewelry buyers seeking long-lasting finish, retail-ready designs, and popular resale items.