$8 Sci-Fi Stairs - 11 - Green Version Low-poly 3D model by 3DHaupt. Available on CGTrader with 4300 polys and 4300 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 1.63 MB), OBJ (OBJ, filesize: 482 KB), OTHER (Other, filesize: 2.29 MB), DAE (Collada, filesize: 1.73 MB), DXF (DXF, filesize: 1.15 MB), 3DS (3D Studio, filesize: 186 KB), FBX (Autodesk FBX, filesize: 976 KB), ABC (Alembic, filesize: 357 KB), BLEND (Blender, filesize: 33.2 MB)