Polyamide (PA) polymers, which we call in our trivial round NYLONS are synthetic polymers. Their main material is a composition of polyamides, which are very strong beacuse of their specific semi-crystal structure. The polyamides have few grades – PA6, PA12, etc. Their specific structures explains the large field of application they have and not only in the 3D printing. They are chemical resistant, thermal stable and have very good mechanical strength. We produce PA12 only.