See also General Information under Nylon 6,6
General Description : The addition of glass fiber to nylons leads to very significant increases in strength, stiffness, heat distortion temperatures, abrasion resistance and dimensional stability, though properties can be anisotropic - including mould shrinkage, leading to potential distortion. In the case of nylon 6,6, unlike many polymers, this is achieved without loss of impact strength, though elongation to break is, as usual, reduced very substantially. Glass-reinforced nylon is commonly colored black.
Applications include many engineering components including "under-bonnet" automobile parts and most components on wind-surfers.