This specific 3D model, "Two rollercoaster 3D Model Pack order", 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.
BLEND (Blender, filesize: 337 MB), OBJ (OBJ, filesize: 27.8 MB), FBX (Autodesk FBX, filesize: 72.4 MB), GLTF (glTF, filesize: 91 MB), TEXTURES (Textures, filesize: 219 MB), DAE (Collada, filesize: 55.1 MB)