!!! To avoid scratching the frame, it is best to line the center with something soft (old handlebar tape, bicycle inner tube). !!!

Maximum pipe width 40mm, height depends on the screws used (you can print)

Sample link: https://www.printables.com/pl/model/253395-m6-hex-screw-and-nut-m6x10-m6x15-m6x20-m6x25-m6x30

Supports settings:

There must be supports in the painted areas

1. holder_part_1
   
   
   
   
2. holder_part_2
   
   
3. Screw
   Support disabled
   (The screw size can be changed in the slicer)