Aluminum Robot Structure - Enclosed 3D model is available on CGTrader for $26. Original author: AnyKolab. Specs: 356164 polys, 479351 verts.
SLDPRT (SolidWorks, filesize: 1.83 MB), OBJ (OBJ, filesize: 3.39 MB), FBX (Autodesk FBX, filesize: 3.62 MB), IGE (IGES, filesize: 2.15 MB), STL (Stereolithography, filesize: 5.06 MB), 3MF (3D Manufacturing File, filesize: 1.32 MB), PDF (PDF, filesize: 2.68 MB), STP (STEP, filesize: 1.69 MB)