roller ball chain connector
thingiverse
This fits ball chains with 4.5 millimeter ball diameter and 1.5 millimeter ball spacing, so just scale accordingly.
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With this file you will be able to print roller ball chain connector 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 roller ball chain connector.