This is a clipstick which is to be used with a telescopic rod from the company Leifheit like this one. But I also included the step file, so you can modify it to use with whatever flor wiper rod you got lying around.
The uploaded version I did not print yet. I reinforced the back of the clipstick because the print in the picture broke right in the reinforced spot due to the poor layer adhesion of my cf-petg print.
For Supports: I print the clipstick standing upright (like in the picture) and only use support on the bottom ring so it has a nice connection to the print bed. For my printer atleast every other overhang was possible without support.