The Ebay auction is for the tool set only!
I have a F.Q. central vacuum as pictured and it's kind of fun. Motor is mounted below dirt can and a 2" hose runs up into the lid. the filter attaches snugly to the inner lid with a rubber gasket and it then sits down in a conical holder. Sort of the same prinicple as putting a FQ cone in place. I often use a cone as well as the filter because I can shake off the cone easily while the pleated filter can be a real messy job.
Suction is great and the clear bin is fun to watch as the dirt goes swizzing around!