This package contains a parametric model of a Calibration Tool for Material Extrusion 3D printers. The parametric model also contains a python scripted Macro for test parameter re-labelling purposes. The model can be used to analyze the quality of the printer in terms of i.a. overhangs, support structures, feature tolerances and surface roughness. Please check the attachment for the following files: -An open source parametric model of FreeCAD [.FCstd] -STL Model [.stl] -Image of the printed Model [.jpg]