Carbon vs. Fiberglass
The vast majority of fibers used in composites are carbon fiber and fiberglass.
Carbon fiber is a tiny (0.0002 to 0.0004 inches in diameter) strand of carbon atoms bonded linearly - making it amazingly strong in that direction. Carbon fibers can be pulled through a resin bath to create pultruded rods and tubes or woven into a fabric and pre-impregnated with resin to later be used to manufacture roll-wrapped tubes or molded parts.
Fiberglass is similar to carbon fiber, but the thin glass filaments are larger than carbon and not quite as strong. Pultruded fiberglass rods and tubes have glass fibers oriented linearly and are incredibly strong.
The choice of whether to use carbon or fiberglass in your application depends on many factors. Below is a breakdown of the most important carbon and fiberglass characteristics.