Guitar Ring - Black Tungsten Ring - 8mm Wedding Ring - Tungsten Carbide Ring - Cork RingGuitar Cork Black Tungsten Ring Shiny Width 8mm Black IP Plating Natural Cork Inlay Guitar String Inlay Dome Waterproof Comfort fit Tungsten Carbide Lifetime Warranty Sizes 7 15 including Half Sizes & Quarter Sizes Hypoallergenic, Cobalt Free Free Ring Box FREE Custom Laser Engraving up to 77 Characters or Symbols. When checking out please make sure you notate the following: 1. Wording you want engraved on the INSIDE of the ring 2. Size of ring 3.