These clips are used to fit the ventilator inside the Dometic roof window (used in a Ford Custom Nugget Westfalia camper). They are designed so the windows can be closed with the ventilator mounted.
The originale metal clips don't work well since the screw head is in the way when you want to unmount the ventilator. Next the mounting level is to heigh, so the window won't close when the ventilator is inserted. These clips will fit the ventilator perfectly for the Dometic roof window with a frame height of 65 mm.