This one of a kind Tungsten Carbide wedding band design by Thorsten is sure to catch anyone?s eye. The center of the ring is inlaid with a special type of material that changes from beautiful blue to purple hues depending on the angle that you are looking at it. Engraving available! See Pictures for Details. Does Not Delay Order. Includes Thorsten Lifetime and Lifetime Sizing Warranty (excluding re-engraving). Available in 4mm, 6mm, 8mm, and 10mm 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.