This well-polished, flat-style wedding ring, made from jewelry-grade, cobalt-free tungsten carbide, is accented with a 2 mm-wide band of white 925 sterling silver inlay into the center. It comes in 6 mm or 8 mm widths, so couples can easily get a matched set and wear it as a promise ring or wedding band. You get the well-known durability of tungsten carbide in a soft gray, scratch-resistant comfort fit. Our guarantee is well-loved also. We never charge our customers for sizing or for exchanges. We always give them a free lifetime warranty and free lifetime sizing. Most of our competition is not so generous, but we think it's pure gold.