NilfiskCFM and the  INOX stainless steel, 3 phase industrial vacuum cleaner Class H14 Absolute filtration, panel filter kit. NO LONGER AVAILABLE this page is here for information relating to replacement parts.

It is found in a matching stainless steel box above the motor enclosure on the opposite end of the machine to the hose, such as in the old photo with the lathe, apparently, in this application, the lathe is cutting Graphite.

The filter inside is SKU 

If you want any other replacement parts and accessories featured below, standard postage is capped at a maximum of $25 within Australia, and free postage after a $400 spend!