Shower cubicle two-sided hook - different sizes 6/8/10/12/14/16mm

Also posted on Thingiverse (9000+ downloads): https://www.thingiverse.com/thing:4868025

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I designed a simple two-sided hook for my glass wall shower cubicle. It is sturdy and easily holds wet towels. I have even dried a packraft and tent hanging from this hook.

Please, select size according to the thickness of your glass wall/door:

6mm (as pictured)
8mm
10mm
12mm
14mm
16mm

Print recommendations
No rafts
No supports
4 perimeters (walls)
20% infill - lines 
0.30 resolution 
Print laying down on one side
PLA works fine