Most Unique Tungsten Tag Necklace. 4mm wide Surgical Stainless Steel Box Chain. Black Carbon Fiber Inlay. Original GESTALT COUTURE Brand. 22 inch Surgical Steel Box Chain (4mm width). Flawless pure Tungsten Carbide. Much heavier than Stainless Steel. Flawless pure Tungsten Carbide. 100% Satisfaction Guaranteed.