This specific 3D model, "Classic ring 3D print model get", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
The licensing terms for this digital asset are governed by "Unknown license".
STL (Stereolithography, filesize: 205 MB), 3DS (3D Studio, filesize: 205 MB), 3DM (Rhinoceros 3D, filesize: 205 MB)