Nilfisk aluminium 38mm neck for the original aluminium wheeled floor nozzle, same as the one in the photo. ONE ONLY
It is simply the 38mm aluminium NECK. The nozzle and vacuum photos are simply to illustrate the nozzle and machine that used said nozzle.
This nozzle came in two widths, 300mm and 400mm. The neck could also be swapped from 38mm to 32mm.
They came in the original kits for the Nilfisk and Tellus GA71 GS81 and GM81 industrial vacuum cleaner and the Nilfisk GM82 industrial vacuum cleaner with the 38mm hose kit. As you can see they are VERY EXPENSIVE compared to modern new floor tools. Andy probably has a second-hand one he'll provide for about $25 if you'd like to keep your unique floor tool in good working order.
At the moment, standard postage within Australia is capped at a maximum of $20!