Nilfisk King GM530 vacuum cleaner activated carbon de-oderiser goes in the dustbag chamber behind the dustbag and pre-filter on the Nilfisk GM500 King Vacuum cleaner models
It's NOW OBSOLETE AND UNAVAILABLE
Its purpose was to help to reduce odours and because it's activated charcoal it had a limited life-time, it needed to be replaced after 2 years.
As it's light, maximise the saving on postage and buy some of the related parts below, such as dustbags and the main HEPA filter underneath the machine, the hose, or a new floor tool.
At the moment, standard postage within Australia is capped at a maximum of $20!