An end cap for square tubes…nothing more. :-) You can configure it for your own needs.

If you like a more tight fit you should decrease(!) thickness as this will build up more pressure. The print profile in ASA has no changes but the strong profile is selected. So feel free to change it to another filament.

Using the model generator:

1. customize your end cap
2. download an STL (easier to handle as the 3MF contains also the model only)
3. Import it into a Bambu Studio or another slicer. There are no special setting I had to apply.
4. Like to suggest ASA for printing as it is rigid and also waterproof but ABS, PETG, … is fine as well. PLA could break so you should not use it if you like a tight fit.