Convert a single-stage dust collector into an efficient two-stage system and reduce the need for frequent bag emptying with a Wall-Mount Cyclone Dust Separator available from Rockler. The cyclone separator filters out the biggest, bag-filling chips before they ever hit the main collection bag, which takes care of the more problematic fine dust. It features a 20-gallon bag with a window to view when the bag is getting full, and 4'' ports for easy connection to common hoses and dust collectors.