*EDIT: Added V2.1 which will print a better thread …
Model uploaded for a acquaintance (and with consent of), Hebert. It’s his work, and we thank him for it :-) .
This is a adapter to place a Manometer on a clip-top bottles. This is used to assess the fermentation-pressure when bottle-fermenting / carbonating.
One has the imprint »Sauerbier« (sour-beer), so you can distinguish the »dangerous« batches when using it ^_^.