A cable spool to coil up and organise extra cables on the back of your printer.
Mount to the printer with DIN965 M3 x 10mm countersunk screws, which fit perfectly into the unused factory drilled holes on the printer's frame.
If you're slicing, add an infill modifier to print the arms solid. A previous print broke with my standard setting of 20% infill.
The author hasn't provided the model origin yet.