Bob-ong
thingiverse
They use a 14mm stem, please share the pictures! Don't miss the Bob-ank too! https://www.thingiverse.com/thing:3444461 This thing was made with Tinkercad. Edit it online at https://www.tinkercad.com/things/9o5hUNwKpiY
Download Model from thingiverse
With this file you will be able to print Bob-ong with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Bob-ong.