51mm
thingiverse
Customized version of https://www.thingiverse.com/thing:4881812 Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=4881812
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With this file you will be able to print 51mm 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 51mm.