this is high performanace fan for engines & such
use the f3d extension for photos results
STL (Stereolithography, filesize: 418 KB), FBX (Autodesk FBX, filesize: 1.69 MB), 3DS (3D Studio, filesize: 472 KB), SKP (Sketchup, filesize: 307 KB), F3D (Autodesk Fusion 360, filesize: 512 KB)