Cement Window 0001 Low-poly 3D model is available on CGTrader for $10. Original author: cgi1688888. Specs: 5146 polys, 5204 verts.
STL (Stereolithography, filesize: 84 Bytes), OBJ (OBJ, filesize: 888 KB), FBX (Autodesk FBX, filesize: 380 KB), MA (Autodesk Maya, filesize: 957 KB)