showerhead holder on vertical tube

A simple showerhead holder. I've used it twice since yesterday : work perfectly on a 18 milimeters diameter vertical tube.

Improvement : one "rondelle_3" glued on "support_sur_pomme" and an other glued on "support_sur_tube" for better stability without straining "vis_ronde_2".

Now, in 2017, on june the 20th, it's still working great ! No problem after more than a year, used everyday by 4 people.

June 2018 : "support_sur_pomme" part is brocken. Life time is about 2 years with PLA and 20%