This is a custom insert for the IKEA SKÅDIS to hold sewing machine bobbins. It's sized for Brother sized bobbins but is slightly oversized so should work for other sewing machine sizes.

I printed the half size as the full size wouldn't fit on my printer bed, the full size is attached as well though.

Creality

Ender 3

No

No

0.28

20%

Printed at 20% infill at 0.28mm, could definitely reduce the infill but since I had a heap of clear filament I wasn't using I decided to up the infill to make it more stable.