This specific 3D model, "Ring N28 3D print model purchase", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
The license for this digital asset is "Unknown license".
STL (Stereolithography, filesize: 12.6 MB), OBJ (OBJ, filesize: 28.6 MB), 3DS (3D Studio, filesize: 6.44 MB), FBX (Autodesk FBX, filesize: 4.53 MB), IGE (IGES, filesize: 38 MB), 3DM (Rhinoceros 3D, filesize: 12.9 MB), STP (STEP, filesize: 16.7 MB)