30 mm
thingiverse
A customized variant of the design at http://www.thingiverse.com/thing:69655 was created using Customizer (http://www.thingiverse.com/apps/customizer/run?thing_id=69655). To fabricate it, follow these steps: set message length to 30mm, nut size as 30, choose Extruder1 for DualExtrusion, set tool length to 10, upload the 'write/Letters.dxf' font file, and select ToolOptions 2 while keeping kerf at 0.3
Download Model from thingiverse
With this file you will be able to print 30 mm 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 30 mm.