Nilfisk VP300 Commercial Vacuum Cleaner Replacement Sack Main Filter
Replacement barrier sack filter, for the Nilfisk VP300 HEPA commercial vacuum cleaner. SIMILAR to the photograph.
These shouldn't be washed, just gently vacuumed should they get dusty.
As a rule of thumb, the dustbag filters out dust greater than 50 microns, about the diameter of a human hair. This filter probably filters down to about 8 microns, and protects the HEPA filter.
The HEPA filter will filter down to .003 of a micron, and should probably be replaced each couple of years.
At the moment, delivery is capped at $20, so, how about choosing to maximise the saving on postage and buy some packets of dustbags, or a hose or a new floor tool, or some other accessories below in related products!