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.
36 Volt .75 HP 1800 RPM brush motor. Fits Nilfisk Advance SC900ST, SC901 (cylindrical model)
Fits Nilfisk Advance 56315611 Brush Motor (alt # 56315611)
This part is listed as fitting the following models: