This is a simple spool/handline for heavy test fishing. The current size holds 150 lb test monofilament for a high speed planer/downrigger setup. The design has small notches along one edge to hold the line. The notches should be printed on the bed.
This should print with no supports. I would not print this in PLA as it will not do well in an outdoor setting. I print it in PETG, but ABS would probably work as well. If you are having issues with layer adhesion along the curve, I would slow print speed somewhat.
The author hasn't provided the model origin yet.