Nilfisk Meteor vacuum cleaner foam pre-filter For H12 HEPA filter this goes in dust container to help protect the H12 HEPA filter behind it. When emptying the dust chamber, make sure you don't loose the plastic cyclonic insert
As of Jan 2019 this part is officially "no longer available" We are looking for a suitable replacement for it.
As it's light, maximise the saving on postage and buy a couple of these pre-filters that protect the cartridge filter and the whole set of filters!
At the moment, standard postage within Australia is capped at a maximum of $20!