This specific 3D model, "Trolley Storage Rack Low-poly 3D model purchase", is an asset made available by "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
The license for this digital asset is "Unknown license".
STL (Stereolithography, filesize: 1.07 MB), OBJ (OBJ, filesize: 1.16 MB), GLTF (glTF, filesize: 62.2 MB), PNG (PNG, filesize: 111 MB), FBX (Autodesk FBX, filesize: 1.82 MB), PLY (Ply, filesize: 437 KB)