The Carbon Hunter Patriot is made from Carbon Fiber and has a beautiful Elk Antler inlay. Red, White and Blue compliments this band to show your support for all First Responders. This ring is great for firefighters and emergency crew that need a ring to be cut in the case of an emergency. Millimeter varies depending on size of ring. Can be made in sizes 6-15. If a bigger size is needed please email me. All sales final.