This specific 3D model, "3D Frame - Wood Carving STL Model for CNC Router 3D print model 10", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
Usage of this 3d asset is subject to the "Unknown license" agreement.
STL (Stereolithography, filesize: 49.6 MB), OBJ (OBJ, filesize: 23.1 MB), ZTL (Zbrush, filesize: 4.89 MB)