Standard PA6 or Nylon 6, is produced at a rate over 4 million tons each year. Its primary consumer is the automotive industry that makes gears, bearings and a variety of under the hood parts from the material. It’s fiber form is also the material that makes toothbrush bristles and guitar strings. Nylon 6 is tough, and highly resistant to abrasion. By adding glass fibers to the composition, Owens Corning maximizes these properties, achieving competitive strength.