Nilfisk GU350 and GU450 Upright Vacuum Cleaner Microstatic Exhaust Filter Pack of 5 NLA
These are now obsolete. Choose Pn. GARFILTEUNI
These are the white filters that fit under the grey grill at the front of the upright part of the machine. I suggest a fresh one is placed in there after each packet of five dustbags has been used.
At the moment, standard postage is capped at a maximum of $20 within Australia, so maximise the saving on postage and buy something in the related parts below!