JCC carbon fiber square solid rods are 100% high-quality carbon fiber with a resin matrix through the pultrusion process by through a heated forming die to cure,  so we can produce the continuous lengths of carbon fiber rods with constant square cross-sections by this process. That means all the strength of the square rods runs laterally along their length. have high strength and stiffness, excellent fatigue resistance, dimensional stability, chemical resistance and other characteristics, which is widely used in various fields.