NitPro Composites manufactures high-qaulity carbon fiber rods in various lengths and dimensions. It is widely used in various industries due to their exceptional strength-to-weight ratio, high tensile strength, stiffness, and resistance to corrosion. The composite rods are made by pultrusion process, where carbon fibers are impregnated with resin and then cured to form a solid structure as well as roll wrapping. 

https://www.nitprocomposites.com/carbon-fiber-rods