National Commercial Vacuum Cleaner Genuine Paper Bags 16 Sheets

This is a set of 16 paper bags for National brand commercial vacuum cleaners.
10 bags are unopened, and 6 have been opened.
These were found while cleaning out a warehouse.
As these are a bit old, the opened bags show some stains.
One bag has significant fading and stains, but I'm including it as it might still be usable.
The unopened bags appear to have no stains, but I haven't opened them to confirm, so please be aware.