design radii
thingiverse
design tool for copying radii when you have to reach into tight spots to find the size you need to duplicate or design a project
Download Model from thingiverse
With this file you will be able to print design radii 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 design radii.