A beautiful 8mm 2 tone Tungsten Carbide unisex wedding ring, Engraved on the inside with ``Tungsten Carbide``. Our tungsten rings are engineered to last a lifetime. The strength of tungsten carbide sets it apart from other metals, allowing it to keep a perfect finish for decades. In comparison, tungsten carbide is four times harder than titanium, five times harder than tool steel and ten times harder than gold or sterling silver. Shaped from extremely high density and temperature resistant materials, tungsten rings are among the most durable in the world. Your tungsten ring will look as new as the day you bought it fifty years from now!