GastroNorm KnockBox

This frame transforms any “1/6” Gastronorm container (16 x 17 cm) into a knockbox. 

You will need a rod with 20mm diameter and ~125mm length. These are typically available as replacement part from your favorite espresso supplier. You could also use a wooden rod instead.

As the containers may vary from manufacturer to manufacturer, you might need to tune the model so that it fits nicely. OpenSCAD file is included for this very reason.