Endcaps for telescopic shower bar

I had to replace the endcaps of my showerbar (old, became yellow and... broken).
There are 2 endcaps : one for the 18mm diameter end of the tube, the other for the 20 mm diameter end.
Inside the endcap, the shape is carved around so the tube cannot move when fixing the bar to the wall.

Printed with a flexible filament, works perfectly.
I did not try printing with ABS or PLA.

According to the diameter of the tubes, one may resize the parts with the slicer for adaptation.