This stunning design by Thorsten combines the high-tech look of White Carbon Fiber inlaid to a Tungsten Carbide ring with beveled edges and is one of the hottest selling styles in America. Engraving available and Does Not Delay Order. Available in 4mm, 6mm, 8mm, 10mm and 12mm widths for couples who want a matching set. Tungsten Carbide - the newest and strongest metal for jewelry that does not scratch easily. Note that the inlay can be scratched. Comfort Fit - domed interior band slides over the knuckle easier with less friction.