This is a Harbor Freight dust collector that has been modified to a two stage system.
The 30 gallon trash can has a Thien baffle lid that separates the vast majority of dust into the can making it much easier to empty than the bag. The inlet is for 4" sewer pvc, but I do have an adapter to 4" hose i can include as well.
The filter was upgraded to a Wynn Environmental canister filter that does a good job of catching fine dust.
I also have some ~4ft hose sections and extra hose clamps I can throw in if you are interested.
I've used the unit for several years and it's been great, only selling because I recently got a high end unit for some larger tools.