The AMB2018-04 test object consists of a dogbone shaped part produced by Powder Bed Fusion (sometimes referred to as Selective Laser Sintering) made from a polyamide. The precursor material is PA12 powder (sometimes referred to as Nylon 12 powder). The primary objectives of AMB2018-04 tests are to predict the primary macroscopic aspects of the print (thickness, mass), the microscopic shape (voids) the tensile properties and the crystallinity of the printed part. https://www.nist.gov/ambench/amb2018-04-description