This beautiful tungsten ring is 4MM in width. It is all high polish finished and it has a dome profile. Tungsten is ranked second hardest next to diamond on the Mohs scale, diamond being a 10 followed by Tungsten as 9. 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 rings come with lifetime warranty.