This beautiful ring is made of Tungsten Carbide with Black Carbon Fiber Inlaid. Tungsten is extremely hard and dense. Combined with carbon and other elements, it becomes tungsten carbide, which registers between 8-9 on the Mohs hardness scale. Tungsten jewelry’s roughly 10 times harder than 18k gold and 4 times harder than Titanium. In addition to Tungsten jewelry’s design and high polish, part of its attraction to consumers is its technical nature.Hardness, assuring long lasting beauty. Permanently polished Tungsten Jewelry take a brilliant high polish and resist scratching longer than any metal ever offered to the public. Tungsten Jewelry will never bend out of shape. Fit: Comfort Fit Material: Tungsten Carbide Features: Highly Scratch-resistant, tungsten is four times harder than titanium Band dimensions: 8MM For people with sensitive skin, tungsten carbide is the perfect jewelry metal. Many people are allergic to gold, silver, or platinum, or more commonly zinc or nickel, which are used as alloys in most jewelry. You don’t have to worry about this with tungsten jewelry, because tungsten jewelry is hypoallergenic. This means that you will no longer have to deal with rashes and discolored skin from wearing your tungsten jewelry. All weights and measurements are approximate and may vary slightly from the listed information. Each ring will come with a FREE black velvet pouch. 30-Day Money Back Guarantee: We want our customers to be happy with our products. We offer 30-Day Money Back Guarantee. If you're not happy with our product for any reasons, you can return it for FULL refund within 30 days from the day you purchased.