My hot end always leaves a bit dirt - strings of filament that sip out during heating or even after print and I just know the place I have to collect them from in between the left extrusions holes.
This is a tiny container to go right there and capture those strings and blobs.
It's meant to be printed in flexible filament so you can easily push the claws it has at the back side into the spares of the double extrusione behind it.
70 x 40 mm for the box.

Freecad-Source (19) is included so you can adapt it easily.

Created on and for an Ender 3 but I believe it will work for many other printers with that type of extrusions.

Update: added a second, somewhat wider version.

Category: 3D Printer Accessories