this is quad copter 3D modeling with texture and material
STL (Stereolithography, filesize: 408 KB), OBJ (OBJ, filesize: 733 KB), 3DS (3D Studio, filesize: 263 KB), BLEND (Blender, filesize: 1.15 MB), DAE (Collada, filesize: 883 KB), FBX (Autodesk FBX, filesize: 187 KB)