Pultrusion profiles is a mechanized process of FRP composites, involves pulling a connection of fibers in the form of roving, mat, or fabric through a resin bath and then through a heated die to cure the resin, and then take shapes of profiles. 
Advantages of pultrusion profiles: 
Anti-corrosion and anti-aging 
Very designable 
Light weight and high strength 
Easy of cutting and installation 
Non-magnetic, non-conductive 
Abundant color for choice