12 mm tunnels
thingiverse
A personalized adaptation of the item available at http://www.thingiverse.com/thing:44815 was created using the Customizer tool found at http://www.thingiverse.com/apps/customizer/run?thing_id=44815. The customization process involved setting type to 1, weight at 11, margin with a value of 0.1, groove depth set to 1, 50 faces ($fn), a 12mm diameter and edges style as 1. The cursor was positioned at a point 100 units away during the process.
Download Model from thingiverse
With this file you will be able to print 12 mm tunnels 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 12 mm tunnels.