Looking for Iron Stair? Get this 3D model from cgdm via CGTrader for $12. Technical specs: 64678 polygons, 68397 vertices.
STL (Stereolithography, filesize: 60.5 MB), OBJ (OBJ, filesize: 60.5 MB), MAX (Autodesk 3ds Max, filesize: 121 MB), 3DS (3D Studio, filesize: 60.5 MB), FBX (Autodesk FBX, filesize: 60.5 MB), C4D (Cinema 4D, filesize: 60.5 MB), LWO (Lightwave, filesize: 60.5 MB), DAE (Collada, filesize: 60.5 MB)