This specific 3D model, "Patterned Ring 3D model Texture Texture 2", 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: 111 MB), OBJ (OBJ, filesize: 111 MB), 3DM (Rhinoceros 3D, filesize: 111 MB), 3DS (3D Studio, filesize: 111 MB), DWG (AutoCAD, filesize: 111 MB), FBX (Autodesk FBX, filesize: 111 MB), LWO (Lightwave, filesize: 111 MB), RIB (Renderman, filesize: 111 MB), SKP (Sketchup, filesize: 111 MB)