Wedding band style #GNG-1016 - Tungsten Carbide / BLACK PVD (Physical vapor deposition) An advanced metal bonding specialty technique achieved by using highly specialized equipment to deposit and bond thin layers of metals via the vacuum deposition method. Our PVD rings are the finest in the jewelry industry and we stand behind them for their beauty and durability.  Wedding band style #GNG-1016 is a handsome, rugged, black tungsten carbide band. Scratch proof and measuring at a bold 8.3 millimeters, this one is very striking, yet unique wedding band. It arrives with full, lifetime fit and finish warranty.