Works up to a wall thickness around 5mm.Print it with "touching buildplate"-support.Drill a 75mm hole, place a drop silicon oil on the thread, insert the thermo-hygrometer into the main part (called "aufnahme"), screw the lid ("blende") on it, place it in the hole, screw the nut ("mutter") from the back to fix the hygrometer.The thread is non-standard (2.2mm pitch, 45° angle) - easier to print than ISO/ANSI/....