20mm
thingiverse
Customized version of https://www.thingiverse.com/thing:3231283 Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=3231283
Download Model from thingiverse
With this file you will be able to print 20mm 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 20mm.