Nilfisk and Tellus GA70 the Nilfisk GS80 and the Nilfisk GM80 and the Nilfisk GM81 commercial/industrial vacuum cleaner replacement cotton main filter with copper ring.
Now comes complete with the large plastic ring (item 71107900).
These aren't just a cotton bag, they have a micron rating and they are part of the Nilfisk dust management system, which has made these machines a world leader when dealing with sensitive, hazardous and nuisance forms of dust.
Maximise the saving on postage and buy several Puregiene toilet rolls a box of Tissues and some soap or maybe some packets of dustbags, or a hose or a new floor tool, or some other accessories!
At the moment, standard postage within Australia is capped at a maximum of $20!