AC elbow drain pipe connector that I made as a replacement for the original that broke version 2.
Printed with supports but only on the build plate. Layer height 0.12 mm with 6 walls and 25% infill.
Printed it with PETG.
Made for a 20mm hole and max 1.5mm thickness (see photos).
Other sizes can easily be made, this one just works for my AC.
The author marked this model as their own original creation.