2.5 inches or 63.5
thingiverse
A personalized adaptation of http://www.thingiverse.com/thing:44815 was created using the Customizer at http://www.thingiverse.com/apps/customizer/run?thing_id=44815. The 3D printing instructions involved setting $fn to 50, edges to 1, type as 0, margin at 0.1, cursor at 100, weight of 11, groove enabled with a diameter of 63.5.
Download Model from thingiverse
With this file you will be able to print 2.5 inches or 63.5 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 2.5 inches or 63.5.