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.
24 volt brush driver motor (disc models) Fits Clarke Focus II L20 Boost and Nilfisk Advance SC500, SC750, SC750ST, SC800, SC800ST, SC1500
Fits Nilfisk Advance 56390072 (alt # 56390072)This part is listed as fitting the following models: