This bent tube is the 3rd from the top in the first picture. It's the ORIGINAL Nilfisk and Tellus method of connecting the parts together, that are both flexible and easily parted to allow for removal of blockages, or swapping and joining the original conductive rubber hoses together. Formerly Pn. 21112600
The second picture shows how it's connected by the 32mm rubber muff.
Fitted to the Nilfisk and Tellus GA70 and the Nilfisk and Tellus GM80 and the Nilfisk and Tellus GA71 GS81 and GM81 industrial vacuum cleaner It connects to the hose by the very flexible rubber muff kit, with the two muff rings. These were originally metal, then blue plastic and now grey plastic.