Top selling Wedding Band Ring 8mm for men or women. This beautiful black tungsten carbide ring with rose gold color Celtic knot weave inlay design over blue carbon fiber inlay is 8MM in width. If you are looking for a ring that is scratch proof and forever keep its shine, then 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. Mens Wedding Rings Black. 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. They CANNOT be stretched. Men's Tungsten Wedding Bands / Celtic Wedding Bands Black, Blue and Gold. (Good news! Matching couples rings in width sizes 2mm, 4mm, 6mm, 8mm, etc. may be available for this style. Please check other product listings)