EDINBURGH Tungsten Ring with Flat Grooved Black Ceramic Inlay - 6mm - 10mm This classic and elegant Tungsten Carbide wedding band by Thorsten features a traditional flat design with a finely polished finish with two grooves in its Black Ceramic inlaid center. Can be worn as a Wedding Band or Promise Ring. Engraving available! See Pictures for Details. Does Not Delay Order. Includes Thorsten Lifetime and Lifetime Sizing Warranty (excluding re-engraving). Available in 6mm, 8mm, and 10mm widths for couples who want a matching set. Tungsten Carbide is the newest and strongest metal for jewelry that does not scratch easily. Black Ceramic will not scratch and does not lose its color. Comfort Fit – domed interior band slides over the knuckle easier with less friction.