This beautiful tungsten carbide ring is 8MM in width and comfort fit. It is all high polish with two matte finish lines going around the ring. If you are looking for a ring that is scratch proof and forever keep its shine, than our Tungsten Carbide rings are for you. Tungsten Carbide is ranked second hardest next to diamond on the Mohs scale, diamond being a 10 followed by Tungsten Carbide as 9. All of our Tungsten rings are Cobalt Free and hypoallergenic. Our rings will not cause skin irritations or turn your fingers green. Due to the Hardness of Tungsten, these rings can be laser engraved, but not hand engraved. All ring come with a 100% Money Back Guarantee and a FREE leather ring Box. polishing and unlike other metals, it will retain the exact polish for many decades to come. Tungsten is about 20 time harder then 18K gold and 6 time harder then tool steel and 5 time harder then Titanium. it is also corrosion resistance.