This specific 3D model, "Women Ring Render 3dm STL OBJ FBX Details 3D print model 130", is an asset made available by "Unknown author".
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STL (Stereolithography, filesize: 15.6 MB), OBJ (OBJ, filesize: 43.9 MB), FBX (Autodesk FBX, filesize: 7.8 MB), 3DM (Rhinoceros 3D, filesize: 35.6 MB)