Daxx Men"s Ceramic Black Carbon Fiber Inlay Ring: * Material: ceramic * Ceramic is hypoallergenic and lightweight * Rates a 9 on a hardness scale of 1 to 10 * Band dimensions: 8mm * Black carbon fiber inlay * Available in sizes 8-12 Every piece of Walmart jewelry passes rigorous inspection at our Quality Assurance labs. So you can buy with confidence — guaranteed. Learn More