Ball chain connector
thingiverse
To repair your ball n chain curtain thingy. Just print and click it on, no glue needed (unless you're paranoia :-) ) The standard one broke ever so often... so made one myself and a little stronger then the standard one. Designed for 5mm balls (pretty much the standard)
Download Model from thingiverse
With this file you will be able to print 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 Ball chain connector.