Cable needles
thingiverse
Blunt ended cabling needles for knitting. V2 is 6.5mm diameter, V4 is 5.5mm diameter. I would recommend either a very fine print setting or using your preferred method for creating a smooth surface (acetone, nail polish, etc) before using it with yarn so that the surface doesn't catch on the fibers.
Download Model from thingiverse
With this file you will be able to print Cable needles 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 Cable needles.