Check out Iron Man Arc Reactor 3D model 3D model on CGTrader for $7. High-quality mesh by Arkdjinso: 633222 vertices.
STL (Stereolithography, filesize: 37.9 MB), OBJ (OBJ, filesize: 15.6 MB), IGE (IGES, filesize: 5.58 MB), DWG (AutoCAD, filesize: 3.46 MB)