18K Rose Gold and Raw Tungsten Carbide 8mm Wide Mens Wedding Ring. This new and unique mens wedding band features the hugely popular tungsten carbide metal with an innovative raw matte finish, contrasted by classic 18K rose gold. The ring is 8mm wide with a flat profile and 5.5mm wide interior and stepped edge. This is a comfort fit ring, meaning it has a slightly curved interior. Designed by Triton for Frederick Goldman.