Revit 2010 family of circular window with wooden ventilation slits. Files are included in cad, fbx, dxf.
RFA (Autodesk Revit, filesize: 564 KB), FBX (Autodesk FBX, filesize: 105 KB), PDF (PDF, filesize: 25.7 KB), DXF (DXF, filesize: 528 KB), DWG (AutoCAD, filesize: 69.4 KB)