Have added them to my business contacts.
I've only been using them for a couple of weeks but the fit is good and they are as good as OEM.
14 Inch disc aglite grit 500 abrasive brush for 28 inch machine.Fits Nilfisk Advance Adgressor 2820D, CMAX 28ST, Convertamatic 24-32, Hydro Retriever 2800, SC750, SC750ST, SC800, SC800ST, SC900ST, SC901 (replaces 56505773)
Fits Aftermarket Nilfisk Advance 56505803 500 Grit BrushThis part is listed as fitting the following models: