Profile: UltraLight Composites specializes in offering carbon fiber tubings. Carbon fiber tube is made of intricately thin fibers with a diameter of only around 0.005 to 0.010 mm. These fibers are woven together to form a yarn which can be immensely used in different fields. Carbon fiber tubes are used in vehicles and sporting goods. Carbon fibers are comprised of microscopic carbon atoms, which when bonded together with the help of crystal alignment, makes the material strong.