"The Rogue Dude" is made with a hand machined Titanium band and a beautiful Dark Black/Gray Elk Antler inlay. This band also features Carbon Fiber to give this piece that Manley but Classy look .Millimeter varies depending on size of ring. Can be made in sizes 6-15. If a bigger or smaller size is needed please give me a call before you order. 541-414-7938 All sales final.