Style: Flat Edge, Gun Metal Finish with Black Ceramic and Tungsten Combination, Width: 7 mm, available in ring sizes P through Z. The ring is stamped Tungsten . Imagine wearing a ring that never needs polishing, a ring that is virtually scratch proof. Tungsten carbide rings are the future. With rugged looks and a modern design our Tungsten carbide rings are prefect as a wedding band or as a fashion accessory. Tungsten carbide is 4 times harder than Titanium. Rated between 8 and 9 on the Mohs scale the hardest of which is diamond being rated a 10. Tungsten Carbide is so hard it can''t be engraved on, Our diamond tipped engraving machine barely makes a scratch. Completely hypoallergenic our Tungsten carbide rings will never turn your finger green or cause irritation to your skin. If you need a durable yet elegant ring this is for you.