This is 9mm width black knot tungsten ring, comfort fit inside, flat profile with black polished shiny steps on the sides.
Tungsten carbide is roughly 10 times harder than 18k gold. In addition to its design and high polish, part of its attraction to consumers is its technical nature. It is hypoallergenic. People with allergies to gold jewelry can wear tungsten jewelry.
Tungsten carbide wedding bands are the top selling metal for men’s wedding bands in America today.