Our luxury grade carbon fiber plates are a great material to start machining rings from raw materials. Carbon fiber is one of the most luxurious supplies we sell. It is used by companies ranging from Boeing to Lamborghini. Our carbon fiber plates come in two thicknesses: 8 mm and 14 mm. Each plate is enough to make 4 carbon fiber rings. Dimensions: 2.5 inches x 2.5 inches x 14 mm.