Pacvac Superpro backpack vacuum cleaner Hypercone pleated conical filter this fits under the cloth dustbag SKU  on the series of backpacks, such as the  But NOT the which uses a different filter SKU 

Keep its performance good by removing it and tapping it to clean the fine dust from the pleats. Replace each year, or more frequently if you don't use the dustbags SKU 

At the moment standard postage within Australia, is capped at a maximum of $25 so maximise the saving on postage and buy something in related items below!