The development of 3D printing materials over the past decade has allowed additive manufacturing to produce functional, end-use parts that have strength characteristics that surpass traditional engineering-grade plastics and even metals. Composite materials introduce continuous, long-strands of Carbon Fibre, Fibreglass, HSHT Fibreglass and Kevlar to Nylon. 3D printed Carbon Fibre can produce parts 20% stronger than the yield strength of Aluminium.