Just a simple cap to keep dust and stuff from geting into the different pressure washer accessories when stored. The tolerances on the different accesorries seems to be a bit inconsistent, the cap is tighter on some than others. That's why i made small bumps on the inside to accommodate different sizes.

AFAIK Karcher uses the same connector as AVA, so the caps should probably fit Karcher accessories too.

I printed it in PETG. Probably doesn't matter how many walls/infill you use.