$24 Roman Chair Back Extension Machine Low-poly 3D model by jdennis. Available on CGTrader with 195904 polys and 587672 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 9.34 MB), OBJ (OBJ, filesize: 25.4 MB), 3DS (3D Studio, filesize: 13.9 MB), FBX (Autodesk FBX, filesize: 8.63 MB), DXF (DXF, filesize: 69.2 MB), JPG (JPG, filesize: 4.59 KB)