This specific 3D model, "Central decor ornament for furniture 3D model 509", 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: 6.37 MB), OBJ (OBJ, filesize: 5.89 MB), FBX (Autodesk FBX, filesize: 6.55 MB)