This is a 1:1 replacement part for the trusty S50 Surpresso by Siemens.

It's the rotating hinge that holds the side door shut.

You can find the other side of the mechanism here, as designed by OmmTom: https://www.thingiverse.com/thing:4818152

0.08 or smaller

Just place it on the buildplate with the "star"-side of the through-hole facing down. You can use supports, but it prints well without.

I usually print small parts with 100% bottom/top and I would recommend doing so here, as it makes the part a lot stronger.

The tolerances are designed to make the part fit as snuggly as possible, so i wouldn't recommend using low resolutions as it will likely not fit onto the original socket anymore.

If needed, I can provide a version with higher tolerances, but both my printers set at 0.08 and lower produced a great result.