The Pro-Staff Elite Sand Blasted Silver Edition is made out of Elk Antler, Exotic Ebony and has a Dual Silver inlay. Also featuring a Sand Blasted Titanium band for strength and durability. This design can also be made with Elk Antler. Millimeter varies depending on size of ring. Can be made in sizes 8-15 If a bigger size is needed please email me. All sales final.