The older Scheppach Basa/HBS 32 vario band saw models had a square dust outlet. This adapter fits on this outlet and can be connected to the smaller Festool hose (listed as D27), which is also the normal hose supplied with Festool vacuum cleaners. There is also a model that allows to connect the larger D36 host.
It can be printed without support using PETG or similar material.
The author marked this model as their own original creation.