All files are in .STL format, exported with tolerance of .005" (Inch) see "List_stl_files_for_3D_printing.pdf" for details.. 01/24/2023, Added 2 files (Light_bkt_3Dmodel_metric.stp) & (Light_bkt_3Dmodel_metric.stl) those files are alternate design to Derlin light bracket so they can be 3D printed (need 350mm bed) or modiyfied if needed.. 06/06/2023, added 2 files (Hanger_for_blinds_mm.stl) & (Hanger_for_blinds_rear_stopper_mm.stl) to be 3D printed in pairs of 2 each, light infill no material requirement