This specific 3D model, "Doors Collection - 60 Pieces Low-poly 3D model purchase", 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".
OBJ (OBJ, filesize: 15 MB), 3DM (Rhinoceros 3D, filesize: 18.6 MB), DAE (Collada, filesize: 8.44 MB), FBX (Autodesk FBX, filesize: 2.01 MB), RFA (Autodesk Revit, filesize: 8.23 MB), 3DS (3D Studio, filesize: 1.86 MB), SKP (Sketchup, filesize: 2.87 MB)