This is a replacement part for the Equalizer® All-In-One Mirror Tool - MT228. In the picture it was printed at .3mm layer height with a .6mm nozzle, and I used a two layer raft to keep it from warping. I didn't use supports on the inside of the hole.

Creality

Ender 3

Yes

Yes

.3mm

100%

I used an Ender 3 V2 with an auto leveling device.