Great Catch all
Your review: This bag is typically the second filter after the paper bag. However, the paper bag rips very easily so this was used in place of the paper. Therefore, we used 2 cloth bags and the unit catches just about everything from nails to stones, to fumed silica (very small particles).
Pros: good product and use for price
Cons: to double these up in the chamber puts a little more stress on the snap down clips to keep the top on.