39mm
thingiverse
Created with Customizer, a customized version of www.thingiverse.com/thing:28566. Instructions To make use of the options listed below, follow these steps: Use one arm. Keep the space for servo head clear at 0 point 2 inches. Extend your robotic arm to 36 inches long.
Download Model from thingiverse
With this file you will be able to print 39mm 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 39mm.