This specific 3D model, "Propane Tank Low-poly 3D model 17", is an asset made available by "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
OBJ (OBJ, filesize: 27.8 MB), BLEND (Blender, filesize: 27.8 MB), FBX (Autodesk FBX, filesize: 27.8 MB)