Black ring-carbon fiber-Acacia woodAcacia wood with polished carbon fiber exterior The "bentwood" liner in this ring is the strongest method of wood ring making, period. This method takes a long thin stripe of wood and bends around itself many times locked together with waterproof epoxy to form a laminate that is very durable. . This ring is designed to last a lifetime and will continue to look as good as the day you received it for years to come. Every size 5 through 14 is available,