This specific 3D model, "Gas mask helmet 3d model scifi Low-poly Low-poly 3D model 317", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
MAX (Autodesk 3ds Max, filesize: 460 KB), OBJ (OBJ, filesize: 155 KB), FBX (Autodesk FBX, filesize: 254 KB)