12 chain
thingiverse
A customized model based on Thingiverse's thing #28405 has been created using the Customizer tool (http://www.thingiverse.com/apps/customizer/run?thing_id=28405). To personalize your version, adjust these settings: t = 3.5, d = 12, l = 22, links = 12, pitch = 12, and r0 = 20. For the type of connector, opt for a straight design.
Download Model from thingiverse
With this file you will be able to print 12 chain 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 chain.