Its Latin name, Lignum Vitae, translates as the "Tree of Life". Long known as the hardest timber in the world, Ironwood has incredible strength, only matched by its beauty. Ironwood has been used in both aesthetic and utilitarian endeavors for centuries. From ornate carvings to pulleys for hoisting, it's strength is unmatched. This design pairs the hardest natural metal in the world, with the hardest natural timber. I brush and hammer the exterior to a smooth rustic look. All titanium rings with inlays are sealed with Titanium Aircraft Adhesive, and each ring is sealed in lustrous water resistant finish. Finally the rings are polished with beeswax. We use jewelers grade 5 6AL-4V titanium in every ring. Specs:Band Width: 6 mm or 8 mmBand Thickness: Circa 1.8 mmFit: Comfort fit Materials: Titanium, Ironwood