Nilfisk CA340 portable electric floor scrubber and the Advance Micromatic electric floor scrubber clean solution filter screen, which is situated in the clean water tank, on the clear solution tube that descends from the top cover.
The photo is of a SIMILAR (a lot more affordable and plenty in stock!) filter screen Pn. 7090546 that is just a bit shorter, and is black plastic not red. It doesn't have the brass disc in the end like this part does.
Maximise the saving on postage and buy some of the related auto scrubber parts below, such as a replacement scrub brush, some scrubbing pads, some replacement squeegee lips or a clean solution filters or a new floor tool and dustbags for your Nilfisk ALTO or WAP vacuum cleaner.
At the moment, standard postage is capped at a maximum of $20 within Australia.