$3 Rack industrial 3D model by homeworlds. Available on CGTrader with 578622 polys and 467316 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 8.41 MB), MAX (Autodesk 3ds Max, filesize: 28.1 MB), FBX (Autodesk FBX, filesize: 18.5 MB), MAT (mat, filesize: 626 KB)