In recent years, with the booming 3D printing industries and applications, the process capability and the specifications for the 3D printers and the associated products have been tightened due to performance and cost competition. Companies are trying to develop the manufacturing capabilities to meet the tighter specifications and quality requirements of the customers, but at the same time struggling to keep the offered prices within accepted levels. This study focuses on exploring and evaluating experimentally the manufacturing process capability of the 3D printers to produce 3D printed parts of different geometries and internal designs to minimize the costs lost. This has been achieved by estimating the actual specifications limit of the studied 3D printers. Moreover, the study starts with exploring the manufacturing process capability and the specifications limit of the available 3D printers in UAEU as well as commercial and industrial 3D printers available in the domestic market. Besides, to come up with guidelines and conclusions to help in understating the specifications of the 3D printers that aimed to be used. Different 3D printers are built to test the process capability of assembled 3D painters to support the objective of the study.