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 STILL in October 2020 looking for a suitable replacement for it.
All we can suggest is buying a sheet of similar density foam from a helpful foam shop, and cutting as many as you would need in a lifetime! Andy 25/10/2020
At the moment, standard postage within Australia is capped at a maximum of $20!