I created these knobs to replace the ones that broke on my cooktop. They match the same shaft key that the GE cook top uses and depth.
Print requires supports and I recommend printing this unit with the presentation side up. I used an Octagram Spiral Top Fill Pattern to add some design to the knob. I recommend using PETG to better handle someone putting a hot pan on them to prevent melting.
The author hasn't provided the model origin yet.